$QMCO
QUANTUM CORP /DE/ Stock $qmco

$qmco Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-K Financial Statement

#000070928321000024 Filed on May 26, 2021

Income Statement

Concept	2021 Q1	2021	2020 Q1
Revenue	$92.40M	$349.6M	$88.20M
YoY Change	4.76%	-13.25%	-14.6%
Cost Of Revenue	$53.50M	$198.8M	$52.10M
YoY Change	2.69%	-13.72%	-14.04%
Gross Profit	$38.90M	$150.8M	$36.10M
YoY Change	7.76%	-12.61%	-15.39%
Gross Profit Margin	42.1%	43.12%	40.93%
Selling, General & Admin	$24.00M	$96.95M	$24.30M
YoY Change	-1.23%	-14.95%	-30.44%
% of Gross Profit	61.7%	64.31%	67.31%
Research & Development	$11.70M	$41.70M	$9.200M
YoY Change	27.17%	14.88%	13.82%
% of Gross Profit	30.08%	27.66%	25.48%
Depreciation & Amortization	$1.800M	$5.700M	$1.200M
YoY Change	50.0%	32.56%	9.09%
% of Gross Profit	4.63%	3.78%	3.32%
Operating Expenses	$35.70M	$142.4M	$33.50M
YoY Change	6.57%	-5.92%	-22.38%
Operating Profit	$3.200M	$8.403M	$2.600M
YoY Change	23.08%	-60.37%	-625.25%
Interest Expense	-$5.700M	$27.52M	-$6.300M
YoY Change	-9.52%	8.57%	-200.22%
% of Operating Profit	-178.13%	327.53%	-242.31%
Other Income/Expense, Net	$100.0K	-$1.312M	$200.0K
YoY Change	-50.0%	402.68%	-79.84%
Pretax Income	-$18.10M	-$35.22M	-$3.500M
YoY Change	417.14%	699.18%	-54.97%
Income Tax	-$600.0K	$239.0K	$300.0K
% Of Pretax Income
Net Earnings	-$17.50M	-$35.46M	-$3.800M
YoY Change	360.53%	580.6%	-59.62%
Net Earnings / Revenue	-18.94%	-10.14%	-4.31%
Basic Earnings Per Share		-$0.83
Diluted Earnings Per Share	-$347.9K	-$0.83	-$95.24K
COMMON SHARES
Basic Shares Outstanding	41.55M shares	42.85M shares	39.86M shares
Diluted Shares Outstanding		42.85M shares

Balance Sheet

Concept	2021 Q1	2021	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$27.40M	$27.40M	$6.400M
YoY Change	328.13%	328.13%
Cash & Equivalents	$27.43M	$27.40M	$6.440M
Short-Term Investments
Other Short-Term Assets	$3.046M	$7.600M	$8.489M
YoY Change	-64.12%	-18.28%	-53.09%
Inventory	$47.90M	$47.90M	$49.70M
Prepaid Expenses	$3.893M
Receivables	$73.10M	$73.10M	$70.37M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$156.1M	$156.1M	$135.8M
YoY Change	14.9%	14.95%	-11.97%
LONG-TERM ASSETS
Property, Plant & Equipment	$10.05M	$19.40M	$9.046M
YoY Change	11.11%	-10.6%	7.22%
Goodwill	$3.466M		$0.00
YoY Change
Intangibles	$5.037M		$0.00
YoY Change			-100.0%
Long-Term Investments
YoY Change
Other Assets	$5.921M	$10.90M	$3.433M
YoY Change	72.47%	29.76%	-33.29%
Total Long-Term Assets	$38.86M	$38.80M	$30.17M
YoY Change	28.81%	28.48%	62.34%
TOTAL ASSETS
Total Short-Term Assets	$156.1M	$156.1M	$135.8M
Total Long-Term Assets	$38.86M	$38.80M	$30.17M
Total Assets	$194.9M	$194.9M	$166.0M
YoY Change	17.43%	17.41%	-3.98%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$35.25M	$35.20M	$36.95M
YoY Change	-4.61%	-4.61%	-1.19%
Accrued Expenses	$18.75M	$35.10M	$17.54M
YoY Change	6.95%	13.96%	-39.59%
Deferred Revenue	$84.03M		$81.49M
YoY Change	3.11%		-9.86%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$1.850M	$1.900M	$7.321M
YoY Change	-74.73%	-73.97%	343.7%
Total Short-Term Liabilities	$159.1M	$159.1M	$158.3M
YoY Change	0.53%	0.51%	-11.33%
LONG-TERM LIABILITIES
Long-Term Debt	$90.90M	$90.90M	$146.8M
YoY Change	-38.1%	-38.08%	0.84%
Other Long-Term Liabilities	$13.06M	$57.20M	$11.15M
YoY Change	17.07%	-3.7%	-5.69%
Total Long-Term Liabilities	$13.06M	$148.1M	$158.0M
YoY Change	-91.74%	-28.18%	0.35%
TOTAL LIABILITIES
Total Short-Term Liabilities	$159.1M	$159.1M	$158.3M
Total Long-Term Liabilities	$13.06M	$148.1M	$158.0M
Total Liabilities	$307.2M	$307.2M	$364.5M
YoY Change	-15.73%	-15.72%	-2.18%
SHAREHOLDERS EQUITY
Retained Earnings	-$738.6M		-$703.2M
YoY Change	5.04%		0.75%
Common Stock	$627.2M		$506.2M
YoY Change	23.92%		1.32%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	-$112.2M	-$112.2M	-$198.5M
YoY Change
Total Liabilities & Shareholders Equity	$194.9M	$194.9M	$166.0M
YoY Change	17.43%	17.41%	-3.98%

Cashflow Statement

Concept	2021 Q1	2021	2020 Q1
OPERATING ACTIVITIES
Net Income	-$17.50M	-$35.46M	-$3.800M
YoY Change	360.53%	580.6%	-59.62%
Depreciation, Depletion And Amortization	$1.800M	$5.700M	$1.200M
YoY Change	50.0%	32.56%	9.09%
Cash From Operating Activities	$19.50M	-$800.0K	$3.800M
YoY Change	413.16%	-32.26%	-140.0%
INVESTING ACTIVITIES
Capital Expenditures	-$2.200M	$6.931M	-$300.0K
YoY Change	633.33%	163.24%	-66.67%
Acquisitions		$2.655M
YoY Change		35.05%
Other Investing Activities	-$100.0K	-$2.700M	-$2.000M
YoY Change	-95.0%	35.0%	-168.97%
Cash From Investing Activities	-$2.300M	-$9.586M	-$2.300M
YoY Change	0.0%	108.44%	-215.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$103.5M	$1.335M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.500M	$31.33M	-2.700M
YoY Change	-44.44%	2486.95%	-137.5%
NET CHANGE
Cash From Operating Activities	19.50M	-$800.0K	3.800M
Cash From Investing Activities	-2.300M	-$9.586M	-2.300M
Cash From Financing Activities	-1.500M	$31.33M	-2.700M
Net Change In Cash	15.70M	$20.87M	-1.200M
YoY Change	-1408.33%	-555.11%	300.0%
FREE CASH FLOW
Cash From Operating Activities	$19.50M	-$800.0K	$3.800M
Capital Expenditures	-$2.200M	$6.931M	-$300.0K
Free Cash Flow	$21.70M	-$7.731M	$4.100M
YoY Change	429.27%	102.7%	-147.67%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Registrant Name EntityRegistrantName	QUANTUM CORP /DE/
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000709283
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021Q1	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesCurrent
CY2020Q1	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesCurrent
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--03-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-13449
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	94-2665054
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	224 Airport Parkway
CY2021	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 550
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	San Jose
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95110
CY2021	dei	City Area Code CityAreaCode	(408)
CY2021	dei	Local Phone Number LocalPhoneNumber	944-4000
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
CY2021	dei	Trading Symbol TradingSymbol	QMCO
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2020Q3	dei	Entity Public Float EntityPublicFloat	88226482	USD
CY2021Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	57086961	shares
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	27430000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6440000	USD
CY2021Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	5037000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	707000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	830000	USD
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	406000	USD
CY2020Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1247000	USD
CY2021Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	73102000	USD
CY2020Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	70370000	USD
CY2021Q1	qtm	Manufacturing Inventories Net ManufacturingInventoriesNet	24467000	USD
CY2020Q1	qtm	Manufacturing Inventories Net ManufacturingInventoriesNet	29196000	USD
CY2021Q1	qtm	Service Parts Inventories ServicePartsInventories	23421000	USD
CY2020Q1	qtm	Service Parts Inventories ServicePartsInventories	20502000	USD
CY2021Q1	us-gaap	Other Assets Current OtherAssetsCurrent	6939000	USD
CY2020Q1	us-gaap	Other Assets Current OtherAssetsCurrent	8489000	USD
CY2021Q1	us-gaap	Assets Current AssetsCurrent	156066000	USD
CY2020Q1	us-gaap	Assets Current AssetsCurrent	135827000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10051000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	9046000	USD
CY2020Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0	USD
CY2021Q1	us-gaap	Goodwill Goodwill	3466000	USD
CY2020Q1	us-gaap	Goodwill Goodwill	0	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	9383000	USD
CY2020Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12689000	USD
CY2021Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5921000	USD
CY2020Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3433000	USD
CY2021Q1	us-gaap	Assets Assets	194924000	USD
CY2020Q1	us-gaap	Assets Assets	165995000	USD
CY2021Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	35245000	USD
CY2020Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	36949000	USD
CY2021Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	84027000	USD
CY2020Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	81492000	USD
CY2021Q1	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	580000	USD
CY2020Q1	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	0	USD
CY2021Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	1850000	USD
CY2020Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	7321000	USD
CY2021Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	19214000	USD
CY2020Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	14957000	USD
CY2021Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	18174000	USD
CY2020Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	17535000	USD
CY2021Q1	us-gaap	Liabilities Current LiabilitiesCurrent	159090000	USD
CY2020Q1	us-gaap	Liabilities Current LiabilitiesCurrent	158254000	USD
CY2021Q1	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	36126000	USD
CY2020Q1	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	37443000	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	90890000	USD
CY2020Q1	us-gaap	Long Term Debt LongTermDebt	146847000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8005000	USD
CY2020Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	10822000	USD
CY2021Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	13058000	USD
CY2020Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11154000	USD
CY2021Q1	us-gaap	Liabilities Liabilities	307169000	USD
CY2020Q1	us-gaap	Liabilities Liabilities	364520000	USD
CY2021Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2020Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2021Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000	shares
CY2020Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000	shares
CY2021Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	56915000	shares
CY2021Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	56915000	shares
CY2020Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	39905000	shares
CY2020Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	39905000	shares
CY2021Q1	us-gaap	Common Stock Value CommonStockValue	570000	USD
CY2020Q1	us-gaap	Common Stock Value CommonStockValue	399000	USD
CY2021Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	626664000	USD
CY2020Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	505762000	USD
CY2021Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-738623000	USD
CY2020Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-703164000	USD
CY2021Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-856000	USD
CY2020Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1522000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	-112245000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	-198525000	USD
CY2021Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	194924000	USD
CY2020Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	165995000	USD
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	349576000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	402949000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	402680000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	198823000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	230441000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	235066000	USD
CY2021	us-gaap	Gross Profit GrossProfit	150753000	USD
CY2020	us-gaap	Gross Profit GrossProfit	172508000	USD
CY2019	us-gaap	Gross Profit GrossProfit	167614000	USD
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	41703000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	36301000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	32113000	USD
CY2021	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	54945000	USD
CY2020	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	59524000	USD
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	69400000	USD
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	42001000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	54457000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	65277000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	3701000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	1022000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	5570000	USD
CY2021	us-gaap	Operating Expenses OperatingExpenses	142350000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	151304000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	172360000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	8403000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	21204000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-4746000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1312000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-261000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2878000	USD
CY2021	us-gaap	Interest Expense InterestExpense	27522000	USD
CY2020	us-gaap	Interest Expense InterestExpense	25350000	USD
CY2019	us-gaap	Interest Expense InterestExpense	21095000	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-14789000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-17458000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-35220000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-4407000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-40421000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	239000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	803000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2376000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-35459000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5210000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-42797000	USD
CY2021	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.83
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.14
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.20
CY2021	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	42852000	shares
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	37593000	shares
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35551000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-35459000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5210000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-42797000	USD
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	666000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-112000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1136000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-34793000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-5322000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-43933000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-35459000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5210000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-42797000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5697000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4287000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4266000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	6301000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4017000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2825000	USD
CY2021	qtm	Long Term Debt Restatement Costs LongTermDebtRestatementCosts	167000	USD
CY2020	qtm	Long Term Debt Restatement Costs LongTermDebtRestatementCosts	0	USD
CY2019	qtm	Long Term Debt Restatement Costs LongTermDebtRestatementCosts	0	USD
CY2021	qtm	Debt Interest Payment Paidin Kind DebtInterestPaymentPaidinKind	0	USD
CY2020	qtm	Debt Interest Payment Paidin Kind DebtInterestPaymentPaidinKind	1858000	USD
CY2019	qtm	Debt Interest Payment Paidin Kind DebtInterestPaymentPaidinKind	0	USD
CY2021	qtm	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	6334000	USD
CY2020	qtm	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	6255000	USD
CY2019	qtm	Service Parts Inventory Write Down ServicePartsInventoryWriteDown	8851000	USD
CY2021	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-577000	USD
CY2020	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	0	USD
CY2019	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	0	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9624000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6748000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3409000	USD
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-34000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-458000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-2356000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-573000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1221000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	315000	USD
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-1243000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-128000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	224000	USD
CY2021	qtm	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	-10087000	USD
CY2020	qtm	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	0	USD
CY2019	qtm	Noncash Gain Loss On Extinguishment Of Debt NoncashGainLossOnExtinguishmentOfDebt	-17851000	USD
CY2021	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	USD
CY2020	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	2729000	USD
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1795000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1625000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-15237000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-8054000	USD
CY2021	qtm	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	-924000	USD
CY2020	qtm	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	11092000	USD
CY2019	qtm	Increase Decrease In Manufacturing Inventories Net IncreaseDecreaseInManufacturingInventoriesNet	-13054000	USD
CY2021	qtm	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	5879000	USD
CY2020	qtm	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	3817000	USD
CY2019	qtm	Increase Decrease In Service Parts Inventories Net IncreaseDecreaseInServicePartsInventoriesNet	3506000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1994000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-768000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-25356000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	418000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-11334000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-8367000	USD
CY2021	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	580000	USD
CY2020	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-2876000	USD
CY2019	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	-2943000	USD
CY2021	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	4257000	USD
CY2020	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-2161000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-2342000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	326000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	4132000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-8629000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-767000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1181000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-16859000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6931000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2633000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2708000	USD
CY2021	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	USD
CY2020	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	USD
CY2019	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	2943000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2655000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1966000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-9586000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4599000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	235000	USD
CY2021	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	19400000	USD
CY2020	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	186780000	USD
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	92782000	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1238000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	121807000	USD
CY2021	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	309920000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	331632000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	320927000	USD
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	313065000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	329012000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	369336000	USD
CY2021	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	10000000	USD
CY2020	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	0	USD
CY2019	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	0	USD
CY2021	qtm	Proceeds From Issuance Shares Net Of Offering Cost ProceedsFromIssuanceSharesNetOfOfferingCost	96756000	USD
CY2020	qtm	Proceeds From Issuance Shares Net Of Offering Cost ProceedsFromIssuanceSharesNetOfOfferingCost	0	USD
CY2019	qtm	Proceeds From Issuance Shares Net Of Offering Cost ProceedsFromIssuanceSharesNetOfOfferingCost	0	USD
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	236000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	171000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	354000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1335000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	31328000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1211000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	16210000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-108000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-16000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	62000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	20867000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4585000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-352000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12270000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16855000	USD
CY2018Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17207000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33137000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12270000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16855000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	24324000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	16488000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	17677000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-2283000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-490000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	68000	USD
CY2021	us-gaap	Contribution Of Property ContributionOfProperty	429000	USD
CY2020	us-gaap	Contribution Of Property ContributionOfProperty	400000	USD
CY2019	us-gaap	Contribution Of Property ContributionOfProperty	408000	USD
CY2021	qtm	Litigation Settlement Paid With Insurance Proceeds LitigationSettlementPaidWithInsuranceProceeds	0	USD
CY2020	qtm	Litigation Settlement Paid With Insurance Proceeds LitigationSettlementPaidWithInsuranceProceeds	8950000	USD
CY2019	qtm	Litigation Settlement Paid With Insurance Proceeds LitigationSettlementPaidWithInsuranceProceeds	0	USD
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	27430000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6440000	USD
CY2019Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10790000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	707000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	830000	USD
CY2019Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1065000	USD
CY2020	qtm	Adjustments To Additional Paid In Capital Warrant Exercised Related To Debt AdjustmentsToAdditionalPaidInCapitalWarrantExercisedRelatedToDebt	0	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6748000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000	USD
CY2019Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	5000000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33137000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12270000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	16855000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	-173467000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-42797000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1136000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-354000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3409000	USD
CY2019	qtm	Reclassifications Of Liability Classified Warrants To Equity Value ReclassificationsOfLiabilityClassifiedWarrantsToEquityValue	14565000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	-199780000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5210000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-112000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-171000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	-198525000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-35459000	USD
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	666000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1335000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	USD
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	-236000	USD
CY2021	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	2080000	USD
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	96755000	USD
CY2021	qtm	Adjustments To Additional Paid In Capital Warrant Exercised Related To Debt AdjustmentsToAdditionalPaidInCapitalWarrantExercisedRelatedToDebt	11515000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9624000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	-112245000	USD
CY2021Q1	qtm	Number Of Components Of Service Revenue NumberOfComponentsOfServiceRevenue	3	component
CY2021	qtm	Product Revenue Performance Obligation Term ProductRevenuePerformanceObligationTerm	P45D
CY2021	us-gaap	Advertising Expense AdvertisingExpense	1500000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	3400000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	4500000	USD
CY2021	qtm	Shipping Handling And Transportation Expenses ShippingHandlingAndTransportationExpenses	9400000	USD
CY2020	qtm	Shipping Handling And Transportation Expenses ShippingHandlingAndTransportationExpenses	9400000	USD
CY2019	qtm	Shipping Handling And Transportation Expenses ShippingHandlingAndTransportationExpenses	9100000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentration of Credit Risk</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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, 2021, 2020 and 2019 no customers represented 10% or more of the Company’s total revenue. Two customers comprised approximately 22% of accounts receivable as of March 31, 2021. No customers comprised more than 10% of accounts receivable as of March 31, 2020. One customer comprised approximately 21% of accounts receivable as of March 31, 2019.</span></div><div><span><br/></span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If the Company is unable to obtain adequate quantities of the inventory needed to sell its products, the Company could face costs increases or delays or discontinuations in product shipments, which could have a material adverse effect on the Company’s results of operations. In many cases, the Company’s chosen vendor may be the sole source of supply for the products or parts they manufacture, or services they provide, for the Company. Some of the products the Company purchases from these sources are proprietary or complex in nature, and therefore cannot be readily or easily replaced by alternative sources.</span></div>
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:8pt;margin-top:8pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. </span></div>Actual results could differ from these estimates and assumptions due to risks and uncertainties, including uncertainty in the current economic environment from the ongoing COVID-19 pandemic. Such estimates include, but are not limited to, the determination of standalone selling price for revenue arrangements with multiple performance obligations, useful lives of intangible assets and property and equipment, stock-based compensation and provision for income taxes including related reserves. Management bases its estimates on historical experience and on various other assumptions which management believes to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
CY2021Q1	qtm	Numberof Geographic Regions NumberofGeographicRegions	3	region
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10051000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	9046000	USD
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1200000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2021	us-gaap	Revenues Revenues	349576000	USD
CY2020	us-gaap	Revenues Revenues	402949000	USD
CY2019	us-gaap	Revenues Revenues	402680000	USD
CY2021Q1	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	120153000	USD
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	79921000	USD
CY2021Q1	qtm	Remaining Performance Obligation Current RemainingPerformanceObligationCurrent	102468000	USD
CY2021Q1	qtm	Remaining Performance Obligation Noncurrent RemainingPerformanceObligationNoncurrent	38771000	USD
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	141239000	USD
CY2021Q1	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.725
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1867000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1867000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1303000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	0	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	0	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5037000	USD
CY2020Q1	us-gaap	Goodwill Goodwill	0	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	3466000	USD
CY2021Q1	us-gaap	Goodwill Goodwill	3466000	USD
CY2021Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	12690000	USD
CY2020Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	16294000	USD
CY2021Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	2074000	USD
CY2020Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	1001000	USD
CY2021Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	9703000	USD
CY2020Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	11901000	USD
CY2021Q1	qtm	Manufacturing Inventories Net ManufacturingInventoriesNet	24467000	USD
CY2020Q1	qtm	Manufacturing Inventories Net ManufacturingInventoriesNet	29196000	USD
CY2021Q1	qtm	Service Parts Inventories Finished Goods ServicePartsInventoriesFinishedGoods	18773000	USD
CY2020Q1	qtm	Service Parts Inventories Finished Goods ServicePartsInventoriesFinishedGoods	15845000	USD
CY2021Q1	qtm	Service Parts Inventories Component Parts ServicePartsInventoriesComponentParts	4648000	USD
CY2020Q1	qtm	Service Parts Inventories Component Parts ServicePartsInventoriesComponentParts	4657000	USD
CY2021Q1	qtm	Service Parts Inventories ServicePartsInventories	23421000	USD
CY2020Q1	qtm	Service Parts Inventories ServicePartsInventories	20502000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46254000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	42399000	USD
CY2021Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	36203000	USD
CY2020Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	33353000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10051000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	9046000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5700000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4300000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4300000	USD
CY2021Q1	qtm	Accrued Expenses AccruedExpenses	6799000	USD
CY2020Q1	qtm	Accrued Expenses AccruedExpenses	3338000	USD
CY2021Q1	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	2906000	USD
CY2020Q1	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	1655000	USD
CY2021Q1	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	2383000	USD
CY2020Q1	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	2668000	USD
CY2021Q1	us-gaap	Interest Payable Current InterestPayableCurrent	57000	USD
CY2020Q1	us-gaap	Interest Payable Current InterestPayableCurrent	3192000	USD
CY2021Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	6029000	USD
CY2020Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	6682000	USD
CY2021Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	18174000	USD
CY2020Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	17535000	USD
CY2020Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	2668000	USD
CY2019Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	3456000	USD
CY2018Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	2422000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	4699000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	3516000	USD
CY2019	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	5766000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	-472000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	-114000	USD
CY2019	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	326000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	4512000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	4190000	USD
CY2019	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	5058000	USD
CY2021Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	2383000	USD
CY2020Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	2668000	USD
CY2019Q1	us-gaap	Standard Product Warranty Accrual Current StandardProductWarrantyAccrualCurrent	3456000	USD
CY2021Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	1850000	USD
CY2020Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	7321000	USD
CY2021Q1	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	9686000	USD
CY2020Q1	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	13660000	USD
CY2021Q1	us-gaap	Long Term Debt LongTermDebt	90890000	USD
CY2020Q1	us-gaap	Long Term Debt LongTermDebt	146847000	USD
CY2019Q4	qtm	Warrant Issued During The Period WarrantIssuedDuringThePeriod	3800000	shares
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	150000000.0	USD
CY2018Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	45000000.0	USD
CY2018Q4	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-800000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	100000	USD
CY2018Q4	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	700000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1400000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	9383000	USD
CY2020Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12689000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2581000	USD
CY2020Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3065000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8005000	USD
CY2020Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	10822000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	10586000	USD
CY2020Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	13887000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	4718000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	4901000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	820000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	277000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	132000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	102000	USD
CY2021	us-gaap	Lease Cost LeaseCost	5670000	USD
CY2020	us-gaap	Lease Cost LeaseCost	5280000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3818000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2766000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2602000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2310000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1910000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1002000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	14408000	USD
CY2021Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3822000	USD
CY2021Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	10586000	USD
CY2021Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y6M10D
CY2020Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y11M26D
CY2021Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.1396
CY2020Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.1391
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	4900000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	4500000	USD
CY2018Q1	us-gaap	Restructuring Reserve RestructuringReserve	5819000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	5570000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	8513000	USD
CY2019Q1	us-gaap	Restructuring Reserve RestructuringReserve	2876000	USD
CY2020	qtm	Restructuring Adjustments RestructuringAdjustments	1022000	USD
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	3961000	USD
CY2020	qtm	Restructuring Reserve Other Non Cash Increase RestructuringReserveOtherNonCashIncrease	63000	USD
CY2020Q1	us-gaap	Restructuring Reserve RestructuringReserve	0	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	3701000	USD
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	3121000	USD
CY2021Q1	us-gaap	Restructuring Reserve RestructuringReserve	580000	USD
CY2021Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	15109489	shares
CY2021Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	103500000	USD
CY2021Q1	qtm	Proceeds From Issuance Shares Net Of Offering Cost ProceedsFromIssuanceSharesNetOfOfferingCost	96800000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9624000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6748000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3409000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9624000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6748000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3409000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-35459000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-5210000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-42797000	USD
CY2021	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	42852000	shares
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	37593000	shares
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	35551000	shares
CY2021	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.83
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.14
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.20
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8402000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7466000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4964000	shares
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-36648000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-6318000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-40935000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1428000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1911000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	514000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-35220000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-4407000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-40421000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-76000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-115000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-217000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	339000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	106000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	31000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	747000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1271000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1103000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1010000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1262000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	917000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-577000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	9000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	33000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	32000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-203000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-492000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1427000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-771000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-459000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1459000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	239000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	803000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2376000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	qtm	Effective Income Tax Rate Reconciliation Expiration Of Attributes Amount EffectiveIncomeTaxRateReconciliationExpirationOfAttributesAmount	9862000	USD
CY2020	qtm	Effective Income Tax Rate Reconciliation Expiration Of Attributes Amount EffectiveIncomeTaxRateReconciliationExpirationOfAttributesAmount	11679000	USD
CY2019	qtm	Effective Income Tax Rate Reconciliation Expiration Of Attributes Amount EffectiveIncomeTaxRateReconciliationExpirationOfAttributesAmount	12268000	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	5444000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2639000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	10913000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	1295000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	914000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	359000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	345000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	280000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	905000	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-207000	USD
CY2021	qtm	Effective Income Tax Rate Reconciliation Credit Monetization Amount EffectiveIncomeTaxRateReconciliationCreditMonetizationAmount	0	USD
CY2020	qtm	Effective Income Tax Rate Reconciliation Credit Monetization Amount EffectiveIncomeTaxRateReconciliationCreditMonetizationAmount	0	USD
CY2019	qtm	Effective Income Tax Rate Reconciliation Credit Monetization Amount EffectiveIncomeTaxRateReconciliationCreditMonetizationAmount	0	USD
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-129000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1612000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2133000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-969000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-20000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-997000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	1829000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	1566000	USD
CY2021Q1	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	12132000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	879000	USD
CY2021	qtm	Effective Income Tax Rate Reconciliation Uncertain Tax Positions Amount EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsAmount	-6695000	USD
CY2020	qtm	Effective Income Tax Rate Reconciliation Uncertain Tax Positions Amount EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsAmount	-8654000	USD
CY2019	qtm	Effective Income Tax Rate Reconciliation Uncertain Tax Positions Amount EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsAmount	-9278000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-7396000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-925000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-8488000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	311000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	122000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-87000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	239000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	803000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2376000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	76153000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	85638000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	21839000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	17043000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	16574000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	17416000	USD
CY2020Q1	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	8958000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	8192000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	16339000	USD
CY2021Q1	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	7811000	USD
CY2020Q1	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	0	USD
CY2021Q1	qtm	Deferred Tax Assets Lease Obligations DeferredTaxAssetsLeaseObligations	1747000	USD
CY2020Q1	qtm	Deferred Tax Assets Lease Obligations DeferredTaxAssetsLeaseObligations	3413000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	1374000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	924000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	569000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	650000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	454000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	2660000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	146845000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	153041000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	143263000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	137814000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3582000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	15227000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1440000	USD
CY2020Q1	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1440000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	1670000	USD
CY2020Q1	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3413000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1013000	USD
CY2020Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	967000	USD
CY2021Q1	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4123000	USD
CY2020Q1	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5820000	USD
CY2021Q1	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	541000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	9407000	USD
CY2021	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	5449000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-2545000	USD
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	10311000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	107282000	USD
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	116032000	USD
CY2018Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	150559000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2560000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2275000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1718000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	144000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	511000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	522000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	25095000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	8712000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	11165000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	11150000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	101119000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	107282000	USD
CY2019Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	116032000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	6200000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	102200000	USD
CY2021Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	83900000	USD
CY2021Q1	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	1200000	USD
CY2021Q1	us-gaap	Increase In Unrecognized Tax Benefits Is Reasonably Possible IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	9100000	USD
CY2021Q1	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	293200000	USD
CY2021Q1	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	59500000	USD
CY2021Q1	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Not Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration	12800000	USD
CY2021Q1	qtm	Operating Loss Carry Forwards Acquired OperatingLossCarryForwardsAcquired	11100000	USD
CY2021Q1	qtm	Tax Credit Carry Forward Acquired Amount TaxCreditCarryForwardAcquiredAmount	8000000.0	USD
CY2021	qtm	Foreign Currency Income Tax Expense Benefit ForeignCurrencyIncomeTaxExpenseBenefit	-600000	USD
CY2021Q1	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	39600000	USD

Files In Submission

Name	View Source	Status
0000709283-21-000024-index-headers.html	Edgar Link	pending
0000709283-21-000024-index.html	Edgar Link	pending
0000709283-21-000024.txt	Edgar Link	pending
0000709283-21-000024-xbrl.zip	Edgar Link	pending
a03312021exhibit-231.htm	Edgar Link	pending
a03312021exhibit-311.htm	Edgar Link	pending
a03312021exhibit-312.htm	Edgar Link	pending
a03312021exhibit-321.htm	Edgar Link	pending
a03312021exhibit-322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
qtm-20210331.htm	Edgar Link	pending
qtm-20210331.xsd	Edgar Link	pending
qtm-20210331_cal.xml	Edgar Link	unprocessable
qtm-20210331_def.xml	Edgar Link	unprocessable
qtm-20210331_g1.jpg	Edgar Link	pending
qtm-20210331_g2.jpg	Edgar Link	pending
qtm-20210331_htm.xml	Edgar Link	completed
qtm-20210331_lab.xml	Edgar Link	unprocessable
qtm-20210331_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R8.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$QMCO
QUANTUM CORP /DE/ Stock $qmco

2021 Q1 Form 10-K Financial Statement

#000070928321000024 Filed on May 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$QMCO QUANTUM CORP /DE/ Stock $qmco

2021 Q1 Form 10-K Financial Statement

#000070928321000024 Filed on May 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$QMCO
QUANTUM CORP /DE/ Stock $qmco