$QMCO
QUANTUM CORP /DE/ Stock $qmco

$qmco Overview Financials Valuation SEC Filings Company Website

2019 Q1 Form 10-K Financial Statement

#000119312519214070 Filed on August 06, 2019

Income Statement

Concept	2019 Q1	2019	2018 Q4
Revenue	$103.3M	$402.7M	$102.0M
YoY Change	8.36%	-8.0%	-12.08%
Cost Of Revenue	$60.61M	$235.1M	$58.90M
YoY Change	1.62%	-11.26%	-19.36%
Gross Profit	$42.67M	$167.6M	$43.08M
YoY Change	19.62%	-2.99%	0.28%
Gross Profit Margin	41.31%	41.62%	42.25%
Selling, General & Admin	$34.94M	$134.7M	$30.47M
YoY Change	-9.05%	-12.76%	-22.12%
% of Gross Profit	81.88%	80.35%	70.73%
Research & Development	$8.083M	$32.11M	$7.907M
YoY Change	-6.07%	-16.81%	-13.7%
% of Gross Profit	18.94%	19.16%	18.35%
Depreciation & Amortization	$1.100M	$4.300M	$1.000M
YoY Change	-8.33%	-13.48%	-23.08%
% of Gross Profit	2.58%	2.57%	2.32%
Operating Expenses	$43.16M	$172.4M	$39.61M
YoY Change	-12.89%	-14.42%	-24.6%
Operating Profit	-$495.0K	-$4.746M	$3.476M
YoY Change	-96.43%	-83.42%	-136.33%
Interest Expense	$6.286M	$21.10M	$6.238M
YoY Change	80.37%	80.76%	110.18%
% of Operating Profit			179.46%
Other Income/Expense, Net	$992.0K	$2.878M	$3.846M
YoY Change	-359.69%	275.23%	1731.43%
Pretax Income	-$7.773M	-$40.42M	-$3.949M
YoY Change	-67.45%	-13.0%	-67.96%
Income Tax	$1.637M	$2.376M	$337.0K
% Of Pretax Income
Net Earnings	-$9.410M	-$42.80M	-$4.286M
YoY Change	-60.68%	-1.27%	-57.98%
Net Earnings / Revenue	-9.11%	-10.63%	-4.2%
Basic Earnings Per Share		-$1.20	-$0.12
Diluted Earnings Per Share	-$0.26	-$1.20	-$0.12
COMMON SHARES
Basic Shares Outstanding			35.55M shares
Diluted Shares Outstanding			35.55M shares

Balance Sheet

Concept	2019 Q1	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments		$10.80M	$10.90M
YoY Change		-0.92%
Cash & Equivalents	$10.79M	$10.80M	$10.93M
Short-Term Investments
Other Short-Term Assets	$18.10M	$8.300M	$7.877M
YoY Change	33.39%	-41.96%	-5.49%
Inventory		$37.50M	$34.10M
Prepaid Expenses	$3.856M
Receivables	$86.83M	$86.80M	$79.57M
Other Receivables		$10.90M	$0.00
Total Short-Term Assets	$154.3M	$154.3M	$133.6M
YoY Change	-13.53%	-13.51%	-22.5%
LONG-TERM ASSETS
Property, Plant & Equipment	$8.437M	$8.400M	$8.773M
YoY Change	-13.0%	-13.4%	-14.21%
Goodwill
YoY Change
Intangibles	$34.00K		$60.00K
YoY Change	-75.36%		-63.41%
Long-Term Investments
YoY Change
Other Assets	$5.146M	$10.10M	$7.632M
YoY Change	-45.84%	-29.86%	-11.9%
Total Long-Term Assets	$18.58M	$18.60M	$21.41M
YoY Change	-23.21%	-23.14%	-31.07%
TOTAL ASSETS
Total Short-Term Assets	$154.3M	$154.3M	$133.6M
Total Long-Term Assets	$18.58M	$18.60M	$21.41M
Total Assets	$172.9M	$172.9M	$155.0M
YoY Change	-14.69%	-14.66%	-23.81%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$37.40M	$37.40M	$38.77M
YoY Change	-40.31%	-40.26%	-32.14%
Accrued Expenses	$29.03M	$49.00M	$25.30M
YoY Change	64.56%	21.59%	32.96%
Deferred Revenue	$90.41M
YoY Change
Short-Term Debt		$0.00	$0.00
YoY Change
Long-Term Debt Due	$1.650M	$1.700M	$1.500M
YoY Change	-78.0%	-77.33%
Total Short-Term Liabilities	$178.5M	$178.5M	$169.1M
YoY Change	-13.9%	-13.89%	-10.43%
LONG-TERM LIABILITIES
Long-Term Debt	$145.6M	$145.6M	$137.1M
YoY Change	25.55%	25.52%
Other Long-Term Liabilities	$11.83M	$48.60M	$10.70M
YoY Change	1.92%	-7.95%	-3.87%
Total Long-Term Liabilities	$157.4M	$194.2M	$147.8M
YoY Change	23.4%	15.05%	1228.13%
TOTAL LIABILITIES
Total Short-Term Liabilities	$178.5M	$178.5M	$169.1M
Total Long-Term Liabilities	$157.4M	$194.2M	$147.8M
Total Liabilities	$372.7M	$372.7M	$351.2M
YoY Change	-0.92%	-0.9%	-1.38%
SHAREHOLDERS EQUITY
Retained Earnings	-$698.0M		-$688.5M
YoY Change	6.53%		9.08%
Common Stock	$499.6M		$493.7M
YoY Change	141025.42%		2.93%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	-$199.8M	-$199.8M	-$196.2M
YoY Change
Total Liabilities & Shareholders Equity	$172.9M	$172.9M	$155.0M
YoY Change	-14.69%	-14.66%	-23.81%

Cashflow Statement

Concept	2019 Q1	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	-$9.410M	-$42.80M	-$4.286M
YoY Change	-60.68%	-1.27%	-57.98%
Depreciation, Depletion And Amortization	$1.100M	$4.300M	$1.000M
YoY Change	-8.33%	-13.48%	-23.08%
Cash From Operating Activities	-$9.500M	-$16.86M	-$10.10M
YoY Change	15.85%	235.04%	-388.57%
INVESTING ACTIVITIES
Capital Expenditures	-$900.0K	$2.708M	-$500.0K
YoY Change	80.0%	4.8%	-44.44%
Acquisitions		$0.00
YoY Change
Other Investing Activities	$2.900M	$2.900M
YoY Change		866.67%
Cash From Investing Activities	$2.000M	$235.0K	-$500.0K
YoY Change	-500.0%	-110.24%	-44.44%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change		-100.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	7.200M	$16.21M	15.60M
YoY Change	554.55%	-244.32%	-257.58%
NET CHANGE
Cash From Operating Activities	-9.500M	-$16.86M	-10.10M
Cash From Investing Activities	2.000M	$235.0K	-500.0K
Cash From Financing Activities	7.200M	$16.21M	15.60M
Net Change In Cash	-300.0K	-$352.0K	5.000M
YoY Change	-96.05%	-98.12%	-168.49%
FREE CASH FLOW
Cash From Operating Activities	-$9.500M	-$16.86M	-$10.10M
Capital Expenditures	-$900.0K	$2.708M	-$500.0K
Free Cash Flow	-$8.600M	-$19.57M	-$9.600M
YoY Change	11.69%	156.92%	-318.18%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2019Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10790000
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	6400000
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	6600000
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5800000
CY2019Q1	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	32400000
CY2018Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10865000
CY2019Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1065000
CY2018Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1342000
CY2019Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	86828000
CY2018Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	96350000
CY2019Q1	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	18440000
CY2018Q1	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	34428000
CY2019Q1	qmco	Service Parts Inventories ServicePartsInventories	19070000
CY2018Q1	qmco	Service Parts Inventories ServicePartsInventories	21889000
CY2019Q1	us-gaap	Other Assets Current OtherAssetsCurrent	18095000
CY2018Q1	us-gaap	Other Assets Current OtherAssetsCurrent	13565000
CY2019Q1	us-gaap	Assets Current AssetsCurrent	154288000
CY2018Q1	us-gaap	Assets Current AssetsCurrent	178439000
CY2019Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	8437000
CY2018Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	9698000
CY2019Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	34000
CY2018Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	138000
CY2019Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000
CY2018Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000
CY2019Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5112000
CY2018Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	9364000
CY2019Q1	us-gaap	Assets Assets	172871000
CY2018Q1	us-gaap	Assets Assets	202639000
CY2019Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	37395000
CY2018Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	62646000
CY2019Q1	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	90407000
CY2018Q1	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	96866000
CY2019Q1	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	2876000
CY2018Q1	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	3166000
CY2019Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	1650000
CY2018Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	7500000
CY2019Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	17117000
CY2018Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	19460000
CY2019Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	29025000
CY2018Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	17638000
CY2019Q1	us-gaap	Liabilities Current LiabilitiesCurrent	178470000
CY2018Q1	us-gaap	Liabilities Current LiabilitiesCurrent	207276000
CY2019Q1	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	36733000
CY2018Q1	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	38587000
CY2019Q1	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	0
CY2018Q1	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	2653000
CY2019Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	145621000
CY2018Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	115986000
CY2019Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11827000
CY2018Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11604000
CY2019Q1	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2019Q1	us-gaap	Common Stock Value CommonStockValue	360000
CY2018Q1	us-gaap	Common Stock Value CommonStockValue	354000
CY2019Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-697954000
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-655157000
CY2019Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1410000
CY2018Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-274000
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	-199780000
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	-173467000
CY2019Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	172871000
CY2018Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	202639000
CY2018Q1	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-42797000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-43346000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-2408000
CY2019	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	4266000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	5394000
CY2018	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	4970000
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	6698000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	3409000
CY2017	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	5635000
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2825000
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1537000
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1373000
CY2019	qmco	Product And Service Parts Inventory Write Down ProductAndServicePartsInventoryWriteDown	8851000
CY2018	qmco	Product And Service Parts Inventory Write Down ProductAndServicePartsInventoryWriteDown	8146000
CY2017	qmco	Product And Service Parts Inventory Write Down ProductAndServicePartsInventoryWriteDown	7609000
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-8054000
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-6510000
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	370000
CY2019	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	-13054000
CY2018	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	2613000
CY2017	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	-3827000
CY2019Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2018Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2019Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	499224000
CY2018Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	481610000
CY2019Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	68000
CY2018Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	320000
CY2019Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2018Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2019Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2018Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2019Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	36040000
CY2018Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35443000
CY2019Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	36040000
CY2018Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35443000
CY2019	us-gaap	Revenues Revenues	402680000
CY2018	us-gaap	Revenues Revenues	437684000
CY2017	us-gaap	Revenues Revenues	493054000
CY2019	us-gaap	Cost Of Revenue CostOfRevenue	235066000
CY2018	us-gaap	Cost Of Revenue CostOfRevenue	264900000
CY2017	us-gaap	Cost Of Revenue CostOfRevenue	287782000
CY2019	us-gaap	Gross Profit GrossProfit	167614000
CY2018	us-gaap	Gross Profit GrossProfit	172784000
CY2017	us-gaap	Gross Profit GrossProfit	205272000
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	32113000
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	38562000
CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	44379000
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	69400000
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	102242000
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	100527000
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	65277000
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	52128000
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	51590000
CY2019	us-gaap	Operating Expenses OperatingExpenses	172360000
CY2018	us-gaap	Operating Expenses OperatingExpenses	201406000
CY2017	us-gaap	Operating Expenses OperatingExpenses	198591000
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-4746000
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	-28622000
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	6681000
CY2019	us-gaap	Interest Expense InterestExpense	21095000
CY2018	us-gaap	Interest Expense InterestExpense	11670000
CY2017	us-gaap	Interest Expense InterestExpense	7993000
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	17458000
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	6934000
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	41000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2878000
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-767000
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-601000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2376000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3113000
CY2019	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	3506000
CY2018	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	6760000
CY2017	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	3404000
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-25356000
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	21647000
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-5284000
CY2019	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-2943000
CY2018	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-463000
CY2017	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-1644000
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-2342000
CY2018	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-4330000
CY2017	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	1784000
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-8367000
CY2018	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	4228000
CY2017	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-1686000
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-8629000
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	5447000
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	3456000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-16859000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-5032000
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8556000
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2708000
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2584000
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2217000
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	51000
CY2018	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	10000
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	736000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	235000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2296000
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1433000
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	507707000
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	367755000
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	104914000
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	491143000
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	316053000
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	113082000
CY2018	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	62827000
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	354000
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1822000
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	737000
CY2017Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	35912000
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1715000
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1019000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16210000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-11232000
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-7886000
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	62000
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-145000
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-352000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-18705000
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-746000
CY2018Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17207000
CY2016Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	36658000
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16855000
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	105000
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	173000
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	279000
CY2019	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	408000
CY2018	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	1036000
CY2017	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	1928000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	17677000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	10244000
CY2017	us-gaap	Interest Paid Net InterestPaidNet	5966000
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	68000
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1455000
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	677000
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1656000
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1402000
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1715000
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1816000
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5990000
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1136000
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	-354000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3409000
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.20
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.25
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.20
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.25
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-40935000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-46923000
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-3794000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	514000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	464000
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	3042000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-40421000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-46459000
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-752000
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-8488000
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-14634000
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-263000
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	359000
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	564000
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	640000
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2133000
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1336000
CY2017	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-159000
CY2018Q1	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	4776000
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-997000
CY2017Q1	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	2006000
CY2019Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	814000
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-830000
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-88000
CY2019	qmco	Effective Income Tax Rate Reconciliation Foreign Rate Differential Amount EffectiveIncomeTaxRateReconciliationForeignRateDifferentialAmount	0
CY2018	qmco	Effective Income Tax Rate Reconciliation Foreign Rate Differential Amount EffectiveIncomeTaxRateReconciliationForeignRateDifferentialAmount	-323000
CY2017	qmco	Effective Income Tax Rate Reconciliation Foreign Rate Differential Amount EffectiveIncomeTaxRateReconciliationForeignRateDifferentialAmount	-120000
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-966000
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-222000
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1308000
CY2019Q1	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	882000
CY2018Q1	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	1364000
CY2018Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	571000
CY2017Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	1370000
CY2019Q1	qmco	Deferred Tax Assets Tax Distribution Reserves DeferredTaxAssetsTaxDistributionReserves	2137000
CY2018Q1	qmco	Deferred Tax Assets Tax Distribution Reserves DeferredTaxAssetsTaxDistributionReserves	2119000
CY2017Q1	qmco	Deferred Tax Assets Tax Distribution Reserves DeferredTaxAssetsTaxDistributionReserves	3028000
CY2019Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	93308000
CY2018Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	62369000
CY2017Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	55784000
CY2019Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	20346000
CY2018Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	20082000
CY2017Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	20767000
CY2019Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	678000
CY2018Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	1371000
CY2017Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Restructuring Charges DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRestructuringCharges	2333000
CY2019Q1	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	13094000
CY2018Q1	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	32936000
CY2017Q1	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	50319000
CY2019Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	7051000
CY2018Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	7146000
CY2017Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	12003000
CY2019Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	141132000
CY2018Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	132734000
CY2017Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	159588000
CY2019Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	140359000
CY2018Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	130048000
CY2017Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	154296000
CY2019Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	773000
CY2018Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2686000
CY2017Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5292000
CY2019Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	450000
CY2018Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	638000
CY2017Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	0
CY2019Q1	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	0
CY2018Q1	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	0
CY2017Q1	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	1332000
CY2019Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	524000
CY2018Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	735000
CY2017Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2552000
CY2019Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	974000
CY2018Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1373000
CY2017Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3884000
CY2019Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	201000
CY2018Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1313000
CY2017Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1408000
CY2017Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	170730000
CY2018	us-gaap	Restructuring Charges RestructuringCharges	8474000
CY2016Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	171374000
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1992000
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	411000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	25000
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	116032000
CY2018Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	150599000
CY2019Q1	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	11100000
CY2019Q1	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	8300000
CY2016Q1	us-gaap	Restructuring Reserve RestructuringReserve	7926000
CY2019	us-gaap	Restructuring Charges RestructuringCharges	5570000
CY2019Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1650000
CY2019Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1650000
CY2019Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1650000
CY2019Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1650000
CY2019Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	157988000
CY2019Q1	us-gaap	Long Term Debt LongTermDebt	164588000
CY2019	us-gaap	Line Of Credit Facility Unused Capacity Commitment Fee Percentage LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	0.00375
CY2018Q3	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	6700000
CY2019Q1	us-gaap	Liabilities Liabilities	372651000
CY2018Q1	us-gaap	Liabilities Liabilities	376106000
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35551000
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	34687000
CY2017	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	33742000
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.20
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.25
CY2017	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.07
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-43933000
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-41944000
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-3178000
CY2019	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	-17851000
CY2018	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	-6962000
CY2018	us-gaap	Restructuring Costs RestructuringCosts	598000
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	315000
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	295000
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	24000
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-268000
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-129000
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-11000
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	224000
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-1437000
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	650000
CY2018	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-3952000
CY2019	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-143000
CY2018	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-210000
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	2729000
CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-118000
CY2019	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	2892000
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	278000
CY2017	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	48000
CY2019Q1	us-gaap	Loss Contingency Damages Paid Value LossContingencyDamagesPaidValue	8200000
CY2017Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	12958000
CY2017Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	101946000
CY2017Q1	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	36274000
CY2017Q1	qmco	Service Parts Inventories ServicePartsInventories	19849000
CY2017Q1	us-gaap	Other Assets Current OtherAssetsCurrent	9183000
CY2017Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	2954000
CY2017Q1	us-gaap	Assets Current AssetsCurrent	183164000
CY2017Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10876000
CY2017Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	276000
CY2017Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	20000000
CY2017Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6926000
CY2017Q1	us-gaap	Assets Assets	221242000
CY2017Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	40826000
CY2017Q1	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	92325000
CY2017Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	15945000
CY2017Q1	us-gaap	Liabilities Current LiabilitiesCurrent	237606000
CY2017Q1	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	38896000
CY2017Q1	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	4388000
CY2017Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	12972000
CY2017Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2017Q1	us-gaap	Common Stock Value CommonStockValue	340000
CY2017Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	473850000
CY2017Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-611811000
CY2017Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1675000
CY2017Q1	us-gaap	Stockholders Equity StockholdersEquity	-139296000
CY2017Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	221242000
CY2017Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	16000
CY2017Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2017Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2017Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	34063000
CY2017Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	34063000
CY2017Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice	0.01
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.00
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.00
CY2017Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	2370000
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	-1888000
CY2018	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease	-210000
CY2018Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	272000
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	5683000
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	-615000
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Period Increase Decrease FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease	297000
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	5637000
CY2019Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	0
CY2018Q1	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	75000
CY2019	qmco	Income Tax Reconciliation Change In Valuation Allowance IncomeTaxReconciliationChangeInValuationAllowance	10913000
CY2018	qmco	Income Tax Reconciliation Change In Valuation Allowance IncomeTaxReconciliationChangeInValuationAllowance	-42784000
CY2017	qmco	Income Tax Reconciliation Change In Valuation Allowance IncomeTaxReconciliationChangeInValuationAllowance	-2745000
CY2019	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-9278000
CY2018	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-336000
CY2017	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	1347000
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-207000
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	52682000
CY2017Q1	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	10752000
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.315
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019Q1	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	2822000
CY2017Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	6837000
CY2019Q1	qmco	Deferred Tax Assets Depreciation DeferredTaxAssetsDepreciation	0
CY2018Q1	qmco	Deferred Tax Assets Depreciation DeferredTaxAssetsDepreciation	0
CY2017Q1	qmco	Deferred Tax Assets Depreciation DeferredTaxAssetsDepreciation	1226000
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	25095000
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	20692000
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1350000
CY2019	qmco	Tax On Unrealised Foreign Translation TaxOnUnrealisedForeignTranslation	3200000
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3409000
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5394000
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6698000
CY2019Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	3231000
CY2018Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	11187000
CY2017Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	179000
CY2017Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.02
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P10M9D
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	4760000
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	5.04
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	177000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	20.23
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	251000
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4M27D
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	250000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	6.20
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	1000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	5.04
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	1000
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	5.04
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P1Y6M25D
CY2017	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-52000
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	3739000
CY2017Q1	us-gaap	Restructuring Reserve RestructuringReserve	6282000
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	8339000
CY2018	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	598000
CY2018Q1	us-gaap	Restructuring Reserve RestructuringReserve	5819000
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	8513000
CY2019Q1	us-gaap	Restructuring Reserve RestructuringReserve	2876000
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1478000
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	26000
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	37000
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1103000
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	206000
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1826000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	917000
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-3252000
CY2017Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	29000
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	32000
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	32000
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family: "times new roman"; font-size: 10pt; margin-top: 18pt; margin-bottom: 0pt; background: none;"><div style="background: none; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;"><div style="font-weight:bold;display:inline;">Reclassifications </div></div></div><div style="font-family: "times new roman"; font-size: 10pt; margin-top: 6pt; margin-bottom: 0pt; background: none;"><div style="background: none; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">Certain prior period amounts in the consolidated financial statements, and notes thereto, have been reclassified to conform to current period presentation. </div></div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2019Q1	qmco	Revenue Remaining Performance Obligation Current RevenueRemainingPerformanceObligationCurrent	103306000
CY2019Q1	qmco	Revenue Remaining Performance Obligation Non Current RevenueRemainingPerformanceObligationNonCurrent	47417000
CY2019Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	150723000
CY2019Q1	qmco	Share Based Compensation Arrangement By Share Based Payment Award Vested And Exercisable Weighted Average Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAndExercisableWeightedAverageIntrinsicValue	0
CY2019	qmco	Share Based Compensation Arrangement By Share Based Payment Award Vested And Exercisable Weighted Average Contractual Term ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedAndExercisableWeightedAverageContractualTerm	P1Y6M25D
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family: "times new roman"; font-size: 10pt; margin-top: 18pt; margin-bottom: 0pt; background: none;"><div style="background: none; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;"><div style="font-weight:bold;display:inline;">Concentrations </div></div></div><div style="font-family: "times new roman"; font-size: 10pt; margin-top: 6pt; margin-bottom: 0pt; background: none;"><div style="background: none; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">The Company sells products to customers in a wide variety of industries on a worldwide basis. In countries or industries where the Company is exposed to material credit risk, the Company may require collateral, including cash deposits and letters of credit, prior to the completion of a transaction. The Company does not believe it has significant credit risk beyond that provided for in the consolidated financial statements in the ordinary course of business. During the fiscal years ended March 31, 2019, 2018</div> and 2017 n<div style="background: none; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">o customers represented 10% or more of the Company’s total revenue. The Company had one customer comprising approximately 21% of accounts receivable as of March 31, 2019, one customer comprising approximately 10% of accounts receivable as of March 31, 2018 and one customer comprising approximately 11% of accounts receivable as of March 31, 2017. </div></div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2019Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	107000
CY2018Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	778000
CY2019Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	6828000
CY2018Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	11565000
CY2018Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	2422000
CY2017Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	3689000
CY2016Q2	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	3448000
CY2019	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	5766000
CY2018	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	5139000
CY2017	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	7491000
CY2019	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	326000
CY2018	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	-116000
CY2017	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	309000
CY2019	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	5058000
CY2018	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	6291000
CY2017	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	7559000
CY2019Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	3456000
CY2017	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	5400000
CY2019Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	11505000
CY2018Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	22085000
CY2019	qmco	Shipping Handling And Transportation Expenses ShippingHandlingAndTransportationExpenses	9100000
CY2018	qmco	Shipping Handling And Transportation Expenses ShippingHandlingAndTransportationExpenses	10300000
CY2017	qmco	Shipping Handling And Transportation Expenses ShippingHandlingAndTransportationExpenses	10400000
CY2019	us-gaap	Advertising Expense AdvertisingExpense	4500000
CY2018	us-gaap	Advertising Expense AdvertisingExpense	8900000
CY2017	us-gaap	Advertising Expense AdvertisingExpense	9700000
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-2356000
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-69000
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-497000
CY2019	us-gaap	Paid In Kind Interest PaidInKindInterest	1670000
CY2018	us-gaap	Paid In Kind Interest PaidInKindInterest	49000
CY2019Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2018Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	4424000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	3922000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	3175000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2185000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1945000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	3705000
CY2019Q1	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	19356000
CY2018	qmco	Reclassifications Of Liability Classified Warrants To Equity Value ReclassificationsOfLiabilityClassifiedWarrantsToEquityValue	1884000
CY2019	qmco	Reclassifications Of Liability Classified Warrants To Equity Value ReclassificationsOfLiabilityClassifiedWarrantsToEquityValue	14565000
CY2017Q1	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	1894000
CY2018Q1	qmco	Contract Receivables Net ContractReceivablesNet	96350000
CY2018Q1	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0
CY2019Q1	qmco	Contract Receivables Net ContractReceivablesNet	86828000
CY2019Q1	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-9522000
CY2019	qmco	Contract With Customer Asset Increase Decrease ContractWithCustomerAssetIncreaseDecrease	0
CY2019	qmco	Deferred Revenue Current Period Increase Decrease DeferredRevenueCurrentPeriodIncreaseDecrease	8459000
CY2019	qmco	Deferred Revenue Non Current Period Increase Decrease DeferredRevenueNonCurrentPeriodIncreaseDecrease	-1854000
CY2019Q1	qmco	Service Parts Inventories Finished Goods ServicePartsInventoriesFinishedGoods	13437000
CY2018Q1	qmco	Service Parts Inventories Finished Goods ServicePartsInventoriesFinishedGoods	14863000
CY2019Q1	qmco	Service Parts Inventories Component Parts ServicePartsInventoriesComponentParts	5633000
CY2018Q1	qmco	Service Parts Inventories Component Parts ServicePartsInventoriesComponentParts	7026000
CY2019Q1	us-gaap	Insurance Settlements Receivable Current InsuranceSettlementsReceivableCurrent	8950000
CY2019Q1	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	3856000
CY2018Q1	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	4331000
CY2019Q1	us-gaap	Income Tax Receivable IncomeTaxReceivable	1927000
CY2018Q1	us-gaap	Income Tax Receivable IncomeTaxReceivable	582000
CY2019Q1	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	3400000
CY2018Q1	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	10900000
CY2019	qmco	Provision For Inventory ProvisionForInventory	13600000
CY2018	qmco	Provision For Inventory ProvisionForInventory	15300000
CY2017	qmco	Defined Benefit Contribution Employer Matching Contribution DefinedBenefitContributionEmployerMatchingContribution	1300000
CY2019	qmco	Defined Benefit Contribution Employer Matching Contribution DefinedBenefitContributionEmployerMatchingContribution	0
	us-gaap	Stockholders Equity Reverse Stock Split StockholdersEquityReverseStockSplit	1 for 8
CY2017Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q1	us-gaap	Deferred Revenue DeferredRevenue	127100000
CY2019	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	83400000
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	905000
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1024000
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	2472000
CY2019	qmco	Income Tax Reconciliation Expiration Of Attributes IncomeTaxReconciliationExpirationOfAttributes	12268000
CY2018	qmco	Income Tax Reconciliation Expiration Of Attributes IncomeTaxReconciliationExpirationOfAttributes	410000
CY2017	qmco	Income Tax Reconciliation Expiration Of Attributes IncomeTaxReconciliationExpirationOfAttributes	1880000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1718000
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3298000
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	37000
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1427000
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	107000
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2789000
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-217000
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-3484000
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-385000
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	31000
CY2017Q1	us-gaap	Subordinated Debt Current SubordinatedDebtCurrent	62827000
CY2017Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	23789000
CY2017Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	66676000
CY2017Q1	us-gaap	Liabilities Liabilities	360538000
CY2017	us-gaap	Depreciation Depreciation	5635000
CY2017	qmco	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	7609000
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-11000
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	650000
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	104914000
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family: "times new roman"; font-size: 10pt; margin-top: 18pt; margin-bottom: 0pt; background: none;"><div style="background: none; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;"><div style="font-weight:bold;display:inline;">Use of Estimates </div></div></div><div style="font-family: "times new roman"; font-size: 10pt; margin-top: 6pt; margin-bottom: 0pt; background: none;"><div style="background: none; color: rgb(0, 0, 0); letter-spacing: 0px; top: 0px;;display:inline;">The preparation of these consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions. Certain accounting estimates involve significant judgments, assumptions and estimates by management that have a material impact on the carrying value of certain assets and liabilities, disclosures of contingent assets and liabilities and the reported amounts of revenues and expenses during the reporting period, which management considers to be critical accounting estimates. The judgments, assumptions and estimates used by management are based on historical experience, management’s experience and other factors, which are believed to be reasonable under the circumstances. Because of the nature of the judgments and assumptions made by management, actual results could differ materially from these judgments and estimates, which could have a material impact on the carrying values of the Company’s assets and liabilities and its results of operations. </div></div><table border="0" style="width:100%; table-layout:fixed;" cellspacing="0" cellpadding="0"><tr><td></td></tr></table>
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	141000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1459000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	139000
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	178000
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	11150000
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	810000
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1672000
CY2019Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	164588000
CY2018Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	123531000
CY2019Q1	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-17317000
CY2018Q1	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-45000
CY2018Q1	us-gaap	Long Term Debt LongTermDebt	115986000
CY2018	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	1700000
CY2018Q4	qmco	Class Of Warrant And Rights Upto Which Warrants Or Rights Are Exercisable ClassOfWarrantAndRightsUptoWhichWarrantsOrRightsAreExercisable	2028-12-27
CY2017Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8661000
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	13983000
CY2017Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	97508000
CY2017Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	99226000
CY2017Q2	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	36686000
CY2017Q3	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	34712000
CY2017Q2	qmco	Service Parts Inventories ServicePartsInventories	19788000
CY2017Q3	qmco	Service Parts Inventories ServicePartsInventories	19915000
CY2017Q2	us-gaap	Other Assets Current OtherAssetsCurrent	9760000
CY2017Q3	us-gaap	Other Assets Current OtherAssetsCurrent	9581000
CY2017Q2	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	3002000
CY2017Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	3063000
CY2017Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10137000
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10420000
CY2017Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	240000
CY2017Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	204000
CY2017Q2	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	20000000
CY2017Q3	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	20000000
CY2017Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6305000
CY2017Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6546000
CY2017Q2	us-gaap	Assets Assets	212087000
CY2017Q3	us-gaap	Assets Assets	217650000
CY2017Q2	us-gaap	Assets Current AssetsCurrent	175405000
CY2017Q3	us-gaap	Assets Current AssetsCurrent	180480000
CY2017Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	44494000
CY2017Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	48488000
CY2017Q2	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	90456000
CY2017Q3	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	88505000
CY2017Q2	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	2878000
CY2017Q3	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	2370000
CY2017Q2	us-gaap	Subordinated Debt Current SubordinatedDebtCurrent	62926000
CY2017Q3	us-gaap	Subordinated Debt Current SubordinatedDebtCurrent	57034000
CY2017Q2	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	17344000
CY2017Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	317000
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	No
CY2018Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	35551570
CY2017Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2017Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	16561000
CY2017Q2	us-gaap	Liabilities Current LiabilitiesCurrent	239316000
CY2017Q3	us-gaap	Liabilities Current LiabilitiesCurrent	235213000
CY2017Q2	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	38149000
CY2017Q3	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	36774000
CY2017Q2	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	4045000
CY2017Q3	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	3615000
CY2017Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10402000
CY2017Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11036000
CY2017Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2017Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2017Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2017Q3	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2017Q2	us-gaap	Common Stock Value CommonStockValue	341000
CY2017Q3	us-gaap	Common Stock Value CommonStockValue	347000
CY2017Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	475357000
CY2017Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	476093000
CY2017Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-615930000
CY2017Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-621028000
CY2017Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1327000
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-891000
CY2017Q2	us-gaap	Stockholders Equity StockholdersEquity	-141559000
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	-145479000
CY2017Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	212087000
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	217650000
CY2017Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	21218000
CY2017Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	22255000
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10309000
CY2018Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10227000
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5704000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10926000
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	96156000
CY2018Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	81427000
CY2018Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	76304000
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	79571000
CY2017Q4	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	35461000
CY2018Q2	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	30666000
CY2018Q3	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	21084000
CY2018Q4	qmco	Manufacturing Inventories Net ManufacturingInventoriesNet	15563000
CY2017Q4	qmco	Service Parts Inventories ServicePartsInventories	19061000
CY2018Q2	qmco	Service Parts Inventories ServicePartsInventories	19397000
CY2018Q3	qmco	Service Parts Inventories ServicePartsInventories	18642000
CY2018Q4	qmco	Service Parts Inventories ServicePartsInventories	18551000
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	8335000
CY2018Q2	us-gaap	Other Assets Current OtherAssetsCurrent	11348000
CY2018Q3	us-gaap	Other Assets Current OtherAssetsCurrent	11291000
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	7877000
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	3054000
CY2018Q2	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1220000
CY2018Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	6124000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1098000
CY2017Q4	us-gaap	Assets Current AssetsCurrent	172376000
CY2018Q2	us-gaap	Assets Current AssetsCurrent	154285000
CY2017Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2018Q3	us-gaap	Assets Current AssetsCurrent	139149000
CY2018Q4	us-gaap	Assets Current AssetsCurrent	133586000
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10226000
CY2018Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	9361000
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	8925000
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	8773000
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	164000
CY2018Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	112000
CY2018Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	86000
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	60000
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	12000000
CY2018Q2	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000
CY2018Q3	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	0
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	8663000
CY2018Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	8500000
CY2018Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6034000
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	7572000
CY2017Q4	us-gaap	Assets Assets	203429000
CY2018Q2	us-gaap	Assets Assets	177258000
CY2018Q3	us-gaap	Assets Assets	154194000
CY2018Q4	us-gaap	Assets Assets	154991000
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	57142000
CY2018Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	51601000
CY2018Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	45021000
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	38774000
CY2017Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	87388000
CY2018Q2	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	94063000
CY2018Q3	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	89020000
CY2018Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	84879000
CY2017Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	5086000
CY2018Q2	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	2681000
CY2018Q3	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	4437000
CY2018Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	3947000
CY2017Q4	us-gaap	Subordinated Debt Current SubordinatedDebtCurrent	0
CY2018Q2	us-gaap	Subordinated Debt Current SubordinatedDebtCurrent	0
CY2018Q3	us-gaap	Subordinated Debt Current SubordinatedDebtCurrent	0
CY2018Q4	us-gaap	Subordinated Debt Current SubordinatedDebtCurrent	0
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	20144000
CY2018Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	15182000
CY2018Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	15559000
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	14705000
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	19024000
CY2018Q2	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	23114000
CY2018Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	29150000
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	25295000
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	188784000
CY2018Q2	us-gaap	Liabilities Current LiabilitiesCurrent	195641000
CY2018Q3	us-gaap	Liabilities Current LiabilitiesCurrent	310701000
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	169100000
CY2017Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	35824000
CY2018Q2	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	36520000
CY2018Q3	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	34577000
CY2017Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11823000
CY2018Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10564000
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10695000
CY2018Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	34361000
CY2017Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	3098000
CY2018Q2	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	2432000
CY2018Q3	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	0
CY2018Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	0
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	117301000
CY2018Q2	us-gaap	Line Of Credit LineOfCredit	112255000
CY2018Q3	us-gaap	Line Of Credit LineOfCredit	0
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	137073000
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11126000
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2018Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2018Q3	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	351000
CY2018Q2	us-gaap	Common Stock Value CommonStockValue	356000
CY2018Q3	us-gaap	Common Stock Value CommonStockValue	358000
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	358000
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	479289000
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CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	493347000
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-631224000
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CY2018Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-684257000
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-688543000
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1120000
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CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1400000
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	-152704000
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	-181413000
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	-201648000
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	-196238000
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	203429000
CY2018Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	177258000
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	154194000
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	154991000
CY2017Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	61734000
CY2017Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	76491000
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	0
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CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1500000
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CY2017Q3	us-gaap	Liabilities Liabilities	363129000
CY2017Q4	us-gaap	Liabilities Liabilities	356133000
CY2018Q2	us-gaap	Liabilities Liabilities	358671000
CY2018Q3	us-gaap	Liabilities Liabilities	355842000
CY2018Q4	us-gaap	Liabilities Liabilities	351229000
CY2017Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2017Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
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CY2017Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	34663000
CY2017Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	34101000
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	34663000
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2018Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2018Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2018Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2018Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35077000
CY2018Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35443000
CY2018Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35556000
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	35553000
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35077000
CY2018Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35443000
CY2018Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35556000
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35553000
CY2017Q3	us-gaap	Revenues Revenues	111786000
CY2017Q3	us-gaap	Cost Of Revenue CostOfRevenue	66467000
CY2017Q3	us-gaap	Gross Profit GrossProfit	45319000
CY2017Q3	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	10190000
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CY2017Q3	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	70000
CY2017Q3	us-gaap	Interest Expense InterestExpense	2638000
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	-5099000
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CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.15
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CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34580000
CY2017Q3	us-gaap	Operating Expenses OperatingExpenses	47590000
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-2271000
	us-gaap	Revenues Revenues	226381000
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	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34338000
CY2017Q2	us-gaap	Revenues Revenues	114595000
CY2017Q2	us-gaap	Cost Of Revenue CostOfRevenue	65757000
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CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1262000
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CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34093000
	us-gaap	Revenues Revenues	226381000
CY2017Q4	us-gaap	Revenues Revenues	115994000
	us-gaap	Revenues Revenues	342375000
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	us-gaap	Cost Of Revenue CostOfRevenue	132224000
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	us-gaap	Cost Of Revenue CostOfRevenue	205258000
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	us-gaap	Gross Profit GrossProfit	94157000
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	us-gaap	Gross Profit GrossProfit	137117000
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	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	20795000
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	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	29957000
CY2018Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	8605000
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	52902000
CY2017Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	26711000
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	79613000
CY2018Q1	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	22629000
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23930000
CY2017Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	12416000
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	36346000
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	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	1701000
CY2017Q4	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	4239000
	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	5940000
CY2018Q1	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	2534000
	us-gaap	Operating Expenses OperatingExpenses	99328000
CY2017Q4	us-gaap	Operating Expenses OperatingExpenses	52528000
	us-gaap	Operating Expenses OperatingExpenses	151856000
CY2018Q1	us-gaap	Operating Expenses OperatingExpenses	49550000
	us-gaap	Operating Income Loss OperatingIncomeLoss	-5171000
CY2019Q1	us-gaap	Gross Profit GrossProfit	42666000
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	us-gaap	Operating Income Loss OperatingIncomeLoss	-14739000
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-13883000
	us-gaap	Interest Expense InterestExpense	5217000
CY2017Q4	us-gaap	Interest Expense InterestExpense	2968000
	us-gaap	Interest Expense InterestExpense	8185000
CY2018Q1	us-gaap	Interest Expense InterestExpense	3485000
CY2017Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	39000
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	39000
CY2017Q4	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	39000
CY2018Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	6895000
CY2017Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-77000
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-175000
CY2017Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-210000
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-385000
CY2018Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-382000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-10252000
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-12326000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-22578000
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-23881000
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	228000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1034000
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2127000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3161000
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	48000
	us-gaap	Net Income Loss NetIncomeLoss	-9218000
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-10199000
	us-gaap	Net Income Loss NetIncomeLoss	-19417000
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-23929000
CY2017Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.12
CY2017Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.15
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.27
CY2017Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.29
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.56
CY2018Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.68
CY2017Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	34093000
CY2017Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	34580000
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	34338000
CY2017Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	34820000
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	34499000
CY2018Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35263000
CY2018Q2	us-gaap	Revenues Revenues	107512000
CY2018Q3	us-gaap	Revenues Revenues	89912000
	us-gaap	Revenues Revenues	197424000
CY2018Q4	us-gaap	Revenues Revenues	101979000
	us-gaap	Revenues Revenues	299403000
CY2019Q1	us-gaap	Revenues Revenues	103277000
CY2018Q2	us-gaap	Cost Of Revenue CostOfRevenue	61173000
CY2018Q3	us-gaap	Cost Of Revenue CostOfRevenue	54385000
	us-gaap	Cost Of Revenue CostOfRevenue	115558000
CY2018Q4	us-gaap	Cost Of Revenue CostOfRevenue	58897000
	us-gaap	Cost Of Revenue CostOfRevenue	174455000
CY2019Q1	us-gaap	Cost Of Revenue CostOfRevenue	60611000
CY2018Q2	us-gaap	Gross Profit GrossProfit	46339000
CY2018Q3	us-gaap	Gross Profit GrossProfit	35527000
	us-gaap	Gross Profit GrossProfit	81866000
CY2018Q4	us-gaap	Gross Profit GrossProfit	43082000
	us-gaap	Gross Profit GrossProfit	124948000
CY2018Q2	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	8261000
CY2018Q3	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	7862000
	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	16123000
CY2018Q4	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	7907000
	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	24030000
CY2019Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	8083000
CY2018Q2	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	19125000
CY2018Q3	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	16682000
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	35807000
CY2018Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	16990000
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	52797000
CY2019Q1	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	16603000
CY2018Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19391000
CY2018Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14072000
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	33463000
CY2018Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13481000
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	46944000
CY2019Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	18333000
CY2018Q2	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	3907000
CY2018Q3	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	294000
	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	4201000
CY2018Q4	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	1227000
	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	5428000
CY2019Q1	qmco	Restructuring Charges To Operating Expense RestructuringChargesToOperatingExpense	142000
CY2018Q2	us-gaap	Operating Expenses OperatingExpenses	50684000
CY2018Q3	us-gaap	Operating Expenses OperatingExpenses	38910000
	us-gaap	Operating Expenses OperatingExpenses	89594000
CY2018Q4	us-gaap	Operating Expenses OperatingExpenses	39605000
	us-gaap	Operating Expenses OperatingExpenses	129199000
CY2019Q1	us-gaap	Operating Expenses OperatingExpenses	43161000
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-4345000
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-3383000
	us-gaap	Operating Income Loss OperatingIncomeLoss	-7728000
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	3477000
	us-gaap	Operating Income Loss OperatingIncomeLoss	-4251000
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-495000
CY2018Q2	us-gaap	Interest Expense InterestExpense	3935000
CY2018Q3	us-gaap	Interest Expense InterestExpense	4636000
	us-gaap	Interest Expense InterestExpense	8571000
CY2018Q4	us-gaap	Interest Expense InterestExpense	6238000
	us-gaap	Interest Expense InterestExpense	14809000
CY2019Q1	us-gaap	Interest Expense InterestExpense	6286000
CY2018Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0
CY2018Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	12425000
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	12425000
CY2018Q4	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	5033000
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	17458000
CY2019Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0
CY2018Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-220000
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	196000
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-24000
CY2018Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3846000
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3870000
CY2019Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	992000
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-8060000
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-20640000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-28700000
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-3948000
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.94
CY2019Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.26
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-32648000
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-7773000
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-575000
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	977000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	402000
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	337000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	739000
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1637000
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-7485000
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-21617000
	us-gaap	Net Income Loss NetIncomeLoss	-29103000
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	-4285000
	us-gaap	Net Income Loss NetIncomeLoss	-33387000
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-9410000
CY2018Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.21
CY2018Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.61
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.82
CY2018Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.12
CY2018Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35444000
CY2018Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35502000
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35473000
CY2018Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35552000
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35500000
CY2019Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35710000
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	250000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	6.20
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.19
CY2016Q1	us-gaap	Stockholders Equity StockholdersEquity	-143098000
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-770000
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1019000
CY2017	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	737000
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6698000
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2610000
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3822000
CY2017Q2	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	427000
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	855000
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1263000
CY2017Q2	us-gaap	Share Based Compensation ShareBasedCompensation	1613000
	us-gaap	Share Based Compensation ShareBasedCompensation	3013000
	us-gaap	Share Based Compensation ShareBasedCompensation	4583000
CY2017Q2	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	0
	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	39000
	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	121000
CY2017Q2	us-gaap	Restructuring Charges RestructuringCharges	0
	us-gaap	Restructuring Charges RestructuringCharges	0
	us-gaap	Restructuring Charges RestructuringCharges	598000
CY2017Q2	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11000
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	292000
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	290000
CY2017Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	98000
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-319000
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2700000
CY2017Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1679000
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1019000
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	963000
CY2017Q2	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	35000
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	72000
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	113000
CY2017Q2	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4595000
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3065000
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	5846000
CY2017Q2	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	-1781000
	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	-1199000
	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	-2976000
CY2017Q2	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	-1195000
	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	-2384000
	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	-3426000
CY2017Q2	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3650000
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7375000
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	16229000
CY2017Q2	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	641000
	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-297000
	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	1902000
CY2017Q2	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-2964000
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-2267000
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-4720000
CY2017Q2	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-2621000
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-5947000
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-8015000
CY2017Q2	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3227000
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-2913000
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	552000
CY2017Q2	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	769000
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1306000
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	3229000
CY2017Q2	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	178000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1151000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2060000
CY2017Q2	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	65000
	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	275000
	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4000
CY2017Q2	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	278000
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	278000
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	278000
CY2017Q2	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	165000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-598000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1778000
CY2017Q2	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	72077000
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	165270000
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	290404000
CY2017Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1000
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1012000
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1012000
CY2017Q2	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-5204000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2709000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-12336000
CY2017Q2	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	21000
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	329000
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	336000
CY2017Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4249000
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1134000
CY2018Q2	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	8576000
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	11826000
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	7744000
CY2018Q2	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2554000
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2670000
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-10295000
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-10549000
CY2017Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	31663000
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	37046000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	25363000
CY2017Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	17000
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	287000
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	88000
CY2017Q2	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	407000
	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	919000
	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	934000
CY2017Q2	us-gaap	Interest Paid Net InterestPaidNet	1561000
	us-gaap	Interest Paid Net InterestPaidNet	4515000
	us-gaap	Interest Paid Net InterestPaidNet	7118000
CY2017Q2	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	508000
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	914000
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1179000
CY2018Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1105000
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2129000
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3150000
CY2018Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	26000
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	52000
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	78000
CY2018Q2	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	171000
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	842000
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2211000
CY2018Q2	qmco	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	3871000
	qmco	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	5859000
	qmco	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	7385000
CY2018Q2	us-gaap	Share Based Compensation ShareBasedCompensation	427000
	us-gaap	Share Based Compensation ShareBasedCompensation	1718000
	us-gaap	Share Based Compensation ShareBasedCompensation	2818000
CY2018Q2	us-gaap	Paid In Kind Interest PaidInKindInterest	632000
	us-gaap	Paid In Kind Interest PaidInKindInterest	1103000
	us-gaap	Paid In Kind Interest PaidInKindInterest	1670000
CY2018Q2	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-895000
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-383000
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	167000
CY2018Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-238000
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-286000
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-382000
CY2018Q2	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-16000
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-43000
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-2861000
CY2018Q2	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	15017000
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	19434000
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	15677000
CY2018Q2	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	3170000
	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	11677000
	qmco	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	16475000
CY2018Q2	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	-860000
	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	-1122000
	qmco	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	-2050000
CY2018Q2	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-11048000
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-17520000
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-24031000
CY2018Q2	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-706000
	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-1382000
	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-1872000
CY2018Q2	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-4564000
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-4415000
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-5542000
CY2018Q2	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-4433000
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-11426000
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-15783000
CY2018Q2	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	695000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1331000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1755000
CY2018Q2	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0
	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0
	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	50000
CY2018Q2	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	322000
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	41000
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	2892000
CY2018Q2	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-373000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1290000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1187000
CY2018Q2	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	77806000
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	164968000
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	397088000
CY2018Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-6000
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-6000
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-6000
CY2018Q2	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2874000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-6622000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	9008000
CY2018Q2	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-67000
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-137000
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-84000
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-760000
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-5379000
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-184000
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16447000
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11828000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17023000
CY2018Q2	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2000
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	104000
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	159000
CY2018Q2	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	72000
	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	176000
	us-gaap	Property Plant And Equipment Transfers And Changes PropertyPlantAndEquipmentTransfersAndChanges	393000
CY2018Q2	us-gaap	Interest Paid Net InterestPaidNet	4399000
	us-gaap	Interest Paid Net InterestPaidNet	9938000
	us-gaap	Interest Paid Net InterestPaidNet	12140000
CY2018Q2	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-58000
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4458000
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	64000
CY2017Q2	qmco	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	2221000
CY2017Q2	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	20000
	qmco	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	4163000
	qmco	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	7073000
CY2018Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-376000
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	603000
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	903000
CY2018Q2	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	1000
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3000
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	31000
CY2017Q2	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	393000
	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	733000
	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	1075000
	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	12425000
	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	17459000
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2019Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	3362000
CY2018Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	8652000
CY2017Q2	us-gaap	Repayments Of Debt RepaymentsOfDebt	77175000
	us-gaap	Repayments Of Debt RepaymentsOfDebt	155766000
	us-gaap	Repayments Of Debt RepaymentsOfDebt	239109000
CY2017Q2	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	0
	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	6030000
	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	62836000
CY2017Q2	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	107000
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1777000
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1807000
CY2018Q2	qmco	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	0
CY2018Q2	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	287000
	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	514000
	us-gaap	Pension Expense Reversal Of Expense Noncash PensionExpenseReversalOfExpenseNoncash	787000
CY2018Q2	us-gaap	Repayments Of Debt RepaymentsOfDebt	80674000
	us-gaap	Repayments Of Debt RepaymentsOfDebt	171584000
	us-gaap	Repayments Of Debt RepaymentsOfDebt	388074000
CY2017Q1	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2017Q3	us-gaap	Costs And Expenses CostsAndExpenses	114057000
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	33000
CY2018Q2	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-108000
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	164000
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-942000
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4964019
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1913423
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6823603
CY2019Q1	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	90500000
CY2019	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	34500000
CY2019Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	98700000
CY2019Q1	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	900000
CY2019	us-gaap	Income Tax Examination Likelihood Of Unfavorable Settlement IncomeTaxExaminationLikelihoodOfUnfavorableSettlement	We file our tax returns as prescribed by the laws of the jurisdictions in which we operate. Our U.S. tax returns have been audited for years through 2002 by the Internal Revenue Service. In other major jurisdictions, we are generally open to examination for the most recent three to five fiscal years. Although timing of the resolution and closure on audits is highly uncertain, we do not believe it is likely that the unrecognized tax benefits would materially change in the next 12 months.
CY2019	dei	Trading Symbol TradingSymbol	QMCO
CY2019	dei	Security12b Title Security12bTitle	Common Stock
CY2019	dei	Security Exchange Name SecurityExchangeName	NONE
CY2017Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight	132000
CY2019Q1	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	0
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	5.04
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	150000000
CY2018Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	45000000
CY2018Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-800000
CY2018Q1	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	100000
CY2018Q1	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	700000
CY2018Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1400000
CY2019Q2	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.0400
CY2019	qmco	Percentage Of Taxable Income PercentageOfTaxableIncome	0.80
CY2012Q4	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	2300000
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-4871000
CY2017Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1313000
CY2017	us-gaap	Restructuring Charges RestructuringCharges	2095000
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.07
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33742000
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33742000
CY2019Q1	qmco	Accrued Expenses AccruedExpenses	8925000
CY2017Q3	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	0
CY2017Q3	us-gaap	Line Of Credit LineOfCredit	76491000
CY2017Q3	us-gaap	Convertible Subordinated Debt Noncurrent ConvertibleSubordinatedDebtNoncurrent	0
	us-gaap	Standard Product Warranty Accrual Period Increase Decrease StandardProductWarrantyAccrualPeriodIncreaseDecrease	0
CY2018Q1	qmco	Accrued Expenses AccruedExpenses	7619000
CY2019Q1	qmco	Accrued Settlement Payable AccruedSettlementPayable	10452000
CY2018Q1	qmco	Accrued Settlement Payable AccruedSettlementPayable	101000
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2000
	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	0
CY2019Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	39369000
CY2018Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	42795000
CY2019Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	30932000
CY2018Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33097000
CY2018	qmco	Defined Benefit Contribution Employer Matching Contribution DefinedBenefitContributionEmployerMatchingContribution	800000
CY2019Q1	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	3456000
CY2018Q1	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	2422000
CY2019Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	4256000
CY2018Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	5320000
CY2017Q2	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	0
CY2017Q2	us-gaap	Paid In Kind Interest PaidInKindInterest	0
CY2017Q2	us-gaap	Standard Product Warranty Accrual Period Increase Decrease StandardProductWarrantyAccrualPeriodIncreaseDecrease	0
CY2019Q1	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	1936000
CY2018Q1	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	2176000
	us-gaap	Paid In Kind Interest PaidInKindInterest	0
CY2017Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.27
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.29
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.56
CY2017Q2	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	0
CY2017Q2	us-gaap	Line Of Credit LineOfCredit	61734000
CY2017Q2	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0
CY2018Q2	us-gaap	Costs And Expenses CostsAndExpenses	111857000
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	93295000
	us-gaap	Costs And Expenses CostsAndExpenses	205152000
CY2018Q4	us-gaap	Costs And Expenses CostsAndExpenses	98502000
	us-gaap	Costs And Expenses CostsAndExpenses	303654000
CY2019Q1	us-gaap	Costs And Expenses CostsAndExpenses	103772000
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.21
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.61
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.82
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.12
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.94
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.26
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.68
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-03-31
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Entity Registrant Name EntityRegistrantName	QUANTUM CORP /DE/
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000709283
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--03-31
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	No
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018Q3	dei	Entity Public Float EntityPublicFloat	64344842

Files In Submission

Name	View Source	Status
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$QMCO
QUANTUM CORP /DE/ Stock $qmco

2019 Q1 Form 10-K Financial Statement

#000119312519214070 Filed on August 06, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$QMCO QUANTUM CORP /DE/ Stock $qmco

2019 Q1 Form 10-K Financial Statement

#000119312519214070 Filed on August 06, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$QMCO
QUANTUM CORP /DE/ Stock $qmco