$IIIN
INSTEEL INDUSTRIES INC Stock $iiin

$iiin Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000143774920021957 Filed on October 29, 2020

Income Statement

Concept	2020 Q4	2019 Q3	2018 Q3
Revenue	$138.2M	$113.4M	$121.4M
YoY Change	41.64%	-6.59%	25.23%
Cost Of Revenue	$118.8M	$109.6M	$101.8M
YoY Change	30.07%	7.66%	26.83%
Gross Profit	$19.50M	$3.800M	$19.50M
YoY Change	212.65%	-80.51%	16.93%
Gross Profit Margin	14.11%	3.35%	16.06%
Selling, General & Admin	$9.300M	$5.900M	$7.500M
YoY Change	61.91%	-21.33%	20.66%
% of Gross Profit	47.69%	155.26%	38.46%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.630M	$3.470M	$3.240M
YoY Change	4.37%	7.1%	13.68%
% of Gross Profit	18.62%	91.32%	16.62%
Operating Expenses	$9.300M	$5.900M	$7.600M
YoY Change	61.91%	-22.37%	22.27%
Operating Profit	$10.20M	-$2.100M	$11.90M
YoY Change	1968.97%	-117.65%	13.77%
Interest Expense	$0.00	$100.0K	$200.0K
YoY Change	-100.0%	-50.0%	488.24%
% of Operating Profit	0.0%		1.68%
Other Income/Expense, Net		$0.00	-$100.0K
YoY Change		-100.0%	100.0%
Pretax Income	$9.400M	-$2.000M	$12.10M
YoY Change	1209.19%	-116.53%	16.45%
Income Tax	$2.000M	-$300.0K	$2.300M
% Of Pretax Income	21.28%		19.01%
Net Earnings	$7.400M	-$1.800M	$9.400M
YoY Change	1233.33%	-119.15%	36.85%
Net Earnings / Revenue	5.35%	-1.59%	7.74%
Basic Earnings Per Share
Diluted Earnings Per Share	$381.4K	-$93.26K	$484.5K
COMMON SHARES
Basic Shares Outstanding	19.31M
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q4	2019 Q3	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$68.70M	$38.20M	$43.90M
YoY Change	2.38%	-12.98%	16.14%
Cash & Equivalents	$68.69M	$38.18M	$43.94M
Short-Term Investments
Other Short-Term Assets	$5.570M	$7.370M	$5.895M
YoY Change	-13.91%	25.02%	-0.91%
Inventory	$68.96M	$70.85M	$94.16M
Prepaid Expenses
Receivables	$53.82M	$44.18M	$51.48M
Other Receivables	$0.00	$1.200M	$0.00
Total Short-Term Assets	$197.0M	$160.6M	$195.5M
YoY Change	13.08%	-17.85%	22.03%
LONG-TERM ASSETS
Property, Plant & Equipment	$101.4M	$105.0M	$106.1M
YoY Change	-1.24%	-1.12%	7.58%
Goodwill	$9.745M	$8.293M	$8.293M
YoY Change	17.51%	0.0%	19.07%
Intangibles	$8.567M	$8.610M	$9.703M
YoY Change	2.76%	-11.26%	22.62%
Long-Term Investments
YoY Change
Other Assets	$21.16M	$10.56M	$9.913M
YoY Change	63.84%	6.55%	6.2%
Total Long-Term Assets	$140.9M	$132.4M	$134.1M
YoY Change	6.55%	-1.22%	9.09%
TOTAL ASSETS
Total Short-Term Assets	$197.0M	$160.6M	$195.5M
Total Long-Term Assets	$140.9M	$132.4M	$134.1M
Total Assets	$337.9M	$293.0M	$329.5M
YoY Change	10.26%	-11.08%	16.41%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$38.96M	$21.60M	$60.06M
YoY Change	22.06%	-64.04%	78.48%
Accrued Expenses	$14.72M	$6.818M	$11.93M
YoY Change	75.98%	-42.85%	37.64%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$53.68M	$28.41M	$71.99M
YoY Change	33.26%	-60.53%	70.11%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$19.42M	$18.58M	$15.88M
YoY Change	-2.84%	16.99%	-8.62%
Total Long-Term Liabilities	$19.42M	$18.58M	$15.88M
YoY Change	-2.84%	16.99%	-8.62%
TOTAL LIABILITIES
Total Short-Term Liabilities	$53.68M	$28.41M	$71.99M
Total Long-Term Liabilities	$19.42M	$18.58M	$15.88M
Total Liabilities	$73.10M	$46.99M	$87.87M
YoY Change	21.28%	-46.52%	47.19%
SHAREHOLDERS EQUITY
Retained Earnings	$171.1M	$154.4M	$151.1M
YoY Change	10.83%	2.18%	11.21%
Common Stock	$95.69M	$93.89M	$92.08M
YoY Change	1.71%	1.97%	3.62%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$264.8M	$246.0M	$241.7M
YoY Change
Total Liabilities & Shareholders Equity	$337.9M	$293.0M	$329.5M
YoY Change	10.26%	-11.08%	16.41%

Cashflow Statement

Concept	2020 Q4	2019 Q3	2018 Q3
OPERATING ACTIVITIES
Net Income	$7.400M	-$1.800M	$9.400M
YoY Change	1233.33%	-119.15%	36.85%
Depreciation, Depletion And Amortization	$3.630M	$3.470M	$3.240M
YoY Change	4.37%	7.1%	13.68%
Cash From Operating Activities	$11.59M	$32.55M	$4.130M
YoY Change	-60.81%	688.14%	-16.57%
INVESTING ACTIVITIES
Capital Expenditures	-$3.660M	-$1.130M	-$5.970M
YoY Change	510.0%	-81.07%	-3.71%
Acquisitions
YoY Change
Other Investing Activities	$120.0K	-$10.00K	-$50.00K
YoY Change	-400.0%	-80.0%	66.67%
Cash From Investing Activities	-$3.540M	-$1.150M	-$6.020M
YoY Change	451.4%	-80.9%	-3.37%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-730.0K	-670.0K	600.0K
YoY Change		-211.67%	-156.6%
NET CHANGE
Cash From Operating Activities	11.59M	32.55M	4.130M
Cash From Investing Activities	-3.540M	-1.150M	-6.020M
Cash From Financing Activities	-730.0K	-670.0K	600.0K
Net Change In Cash	7.320M	30.73M	-1.290M
YoY Change	-74.7%	-2482.17%	-44.87%
FREE CASH FLOW
Cash From Operating Activities	$11.59M	$32.55M	$4.130M
Capital Expenditures	-$3.660M	-$1.130M	-$5.970M
Free Cash Flow	$15.25M	$33.68M	$10.10M
YoY Change	-49.46%	233.47%	-9.42%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	19305612
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	93000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-239000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	44000	USD
CY2019Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2019Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
CY2019Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
CY2019Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19304000
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19304000
CY2019Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19261000
CY2019Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19261000
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	24170000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	7455000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	42630000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5161000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1857000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1254000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1773000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-274000	USD
CY2020	us-gaap	Interest Expense InterestExpense	106000	USD
CY2019	us-gaap	Interest Expense InterestExpense	168000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6364000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	19009000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	5598000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	36266000	USD
CY2018	us-gaap	Interest Expense InterestExpense	114000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	473000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	293000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	515000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	65000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	pure
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2018	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	472618000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	455713000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	453217000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	416831000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	425652000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	382410000	USD
CY2020	us-gaap	Gross Profit GrossProfit	55787000	USD
CY2019	us-gaap	Gross Profit GrossProfit	30061000	USD
CY2018	us-gaap	Gross Profit GrossProfit	70807000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	31348000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	24504000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	28304000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	1695000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	195000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.99
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.90
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.98
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.88
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.12
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	154372000	USD
CY2019Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	8610000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	9745000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	6818000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	53678000	USD
CY2019Q3	us-gaap	Liabilities Current LiabilitiesCurrent	28413000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	8293000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	21160000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19278000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19243000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19079000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19383000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19340000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19277000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	19009000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	5598000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	36266000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	292000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	-754000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	139000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	292000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-754000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	139000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19301000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4844000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	36405000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	68688000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	38181000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	53817000	USD
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	44182000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	68963000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	70851000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	5570000	USD
CY2019Q3	us-gaap	Other Assets Current OtherAssetsCurrent	7370000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	197038000	USD
CY2019Q3	us-gaap	Assets Current AssetsCurrent	160584000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	101392000	USD
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CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	10562000	USD
CY2020Q4	us-gaap	Assets Assets	337902000	USD
CY2019Q3	us-gaap	Assets Assets	293009000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	38961000	USD
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CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	19421000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	18579000	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
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CY2019Q3	us-gaap	Common Stock Value CommonStockValue	19261000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	76387000	USD
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CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1956000	USD
CY2019Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2248000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	264803000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	246017000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	337902000	USD
CY2019Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	293009000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	223376000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	36266000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	139000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2081000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2078000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	942000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	0	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	21333000	USD
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	5598000	USD
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CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	0	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2057000	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	239000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2310000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	246017000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	19009000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	292000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	0	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2028000	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	230000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2313000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	264803000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	19009000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	5598000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	36266000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	14255000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	13553000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	12818000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	66000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	65000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	65000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	2028000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	2057000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	2078000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-424000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1798000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2807000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	343000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	1114000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	1688000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-381000	USD
CY2020	iiin	Increase In Cash Surrender Value Of Life Insurance Policies Over Premiums Paid IncreaseInCashSurrenderValueOfLifeInsurancePoliciesOverPremiumsPaid	243000	USD
CY2019	iiin	Increase In Cash Surrender Value Of Life Insurance Policies Over Premiums Paid IncreaseInCashSurrenderValueOfLifeInsurancePoliciesOverPremiumsPaid	187000	USD
CY2018	iiin	Increase In Cash Surrender Value Of Life Insurance Policies Over Premiums Paid IncreaseInCashSurrenderValueOfLifeInsurancePoliciesOverPremiumsPaid	553000	USD
CY2020	iiin	Gain From Life Insurance Proceeds GainFromLifeInsuranceProceeds	200000	USD
CY2019	iiin	Gain From Life Insurance Proceeds GainFromLifeInsuranceProceeds	-0	USD
CY2018	iiin	Gain From Life Insurance Proceeds GainFromLifeInsuranceProceeds	-0	USD
CY2020	iiin	Proceeds From Assets Held For Sale ProceedsFromAssetsHeldForSale	2186000	USD
CY2019	iiin	Proceeds From Assets Held For Sale ProceedsFromAssetsHeldForSale	0	USD
CY2018	iiin	Proceeds From Assets Held For Sale ProceedsFromAssetsHeldForSale	0	USD
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	200000	USD
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-23174000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-9556000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-21939000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	322000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	44333000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	5806000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-7302000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	11200000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-5060000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-23306000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	12304000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	20159000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-42592000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	28234000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3091000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2604000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-991000	USD
CY2020	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	37215000	USD
CY2019	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1010000	USD
CY2018	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	17703000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	56224000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	6608000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	53969000	USD
CY2020	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	18356000	USD
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	-0	USD
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	3300000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	7114000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	10512000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	18449000	USD
CY2020	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	USD
CY2019	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	1192000	USD
CY2018	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	40000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	19000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2020	iiin	Proceeds From Surrender Of Life Insurance Policies ProceedsFromSurrenderOfLifeInsurancePolicies	260000	USD
CY2019	iiin	Proceeds From Surrender Of Life Insurance Policies ProceedsFromSurrenderOfLifeInsurancePolicies	67000	USD
CY2018	iiin	Proceeds From Surrender Of Life Insurance Policies ProceedsFromSurrenderOfLifeInsurancePolicies	165000	USD
CY2020	iiin	Increase In Cash Surrender Value Of Life Insurance Policies IncreaseInCashSurrenderValueOfLifeInsurancePolicies	390000	USD
CY2019	iiin	Increase In Cash Surrender Value Of Life Insurance Policies IncreaseInCashSurrenderValueOfLifeInsurancePolicies	322000	USD
CY2018	iiin	Increase In Cash Surrender Value Of Life Insurance Policies IncreaseInCashSurrenderValueOfLifeInsurancePolicies	355000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	372000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	322000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	44333000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	372000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2313000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2310000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	21333000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2081000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	230000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	239000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	942000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	-0	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	263000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	-0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2543000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2812000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-20194000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	30507000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-5760000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	11836000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	38181000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	43941000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	32105000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	68688000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	38181000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	43941000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	49000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1919000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1743000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7777000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	769000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	377000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	967000	USD
CY2020	iiin	Restricted Stock Units And Stock Options Surrendered For Withholding Taxes Payable RestrictedStockUnitsAndStockOptionsSurrenderedForWithholdingTaxesPayable	230000	USD
CY2019	iiin	Restricted Stock Units And Stock Options Surrendered For Withholding Taxes Payable RestrictedStockUnitsAndStockOptionsSurrenderedForWithholdingTaxesPayable	239000	USD
CY2018	iiin	Restricted Stock Units And Stock Options Surrendered For Withholding Taxes Payable RestrictedStockUnitsAndStockOptionsSurrenderedForWithholdingTaxesPayable	942000	USD
CY2020	iiin	Noncash Or Part Noncash Acquisition Accrued Holdback Liability NoncashOrPartNoncashAcquisitionAccruedHoldbackLiability	1000000	USD
CY2019	iiin	Noncash Or Part Noncash Acquisition Accrued Holdback Liability NoncashOrPartNoncashAcquisitionAccruedHoldbackLiability	0	USD
CY2018	iiin	Noncash Or Part Noncash Acquisition Accrued Holdback Liability NoncashOrPartNoncashAcquisitionAccruedHoldbackLiability	0	USD
CY2020	us-gaap	Fiscal Period FiscalPeriod	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:36pt;"><b><i>Fiscal year.</i></b> Our fiscal year is the <em style="font: inherit;">52</em> or <em style="font: inherit;">53</em> weeks ending on the Saturday closest to <em style="font: inherit;"> September 30. </em>Fiscal year <em style="font: inherit;">2020</em> was a <em style="font: inherit;">53</em>-week period, and fiscal years <em style="font: inherit;">2019</em> and <em style="font: inherit;">2018</em> were <em style="font: inherit;">52</em>-week periods. All references to years relate to fiscal years rather than calendar years. </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p>
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:36pt;"><b><i>Use of estimates.</i></b><b> </b>The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“U.S.” and such accounting principles, “GAAP”) requires us to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. There is <em style="font: inherit;">no</em> assurance that actual results will <em style="font: inherit;">not</em> differ from these estimates.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><b><i> </i></b></p>
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:36pt;"><b><i>Concentration of </i></b><b><i>c</i></b><b><i>redit </i></b><b><i>r</i></b><b><i>isk</i></b><b><i>. </i></b>Financial instruments that subject us to concentrations of credit risk consist principally of cash and cash equivalents and trade accounts receivable. Our cash is principally concentrated at <em style="font: inherit;">one</em> financial institution, which at times exceeds federally insured limits. We are exposed to credit risk in the event of default by institutions in which our cash and cash equivalents are held and by customers to the extent of the amounts recorded on the balance sheet. We invest excess cash primarily in money market funds, which are highly liquid securities.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:36pt;">The majority of our accounts receivable are due from customers that are located in the U.S. and are generally <em style="font: inherit;">not</em> secured by collateral depending upon the creditworthiness of the account. We provide an allowance for doubtful accounts based upon our assessment of the credit risk of specific customers, historical trends and other information. We write off accounts receivable when they become uncollectible. There is <em style="font: inherit;">no</em> disproportionate concentration of credit risk.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p>
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	255000	USD
CY2020	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:36pt;"><b><i>Property, plant and equipment.</i></b> Property, plant and equipment are recorded at cost or fair market value in the case of the assets acquired through acquisitions, or otherwise at reduced values to the extent there have been asset impairment write-downs. Expenditures for maintenance and repairs are charged directly to expense when incurred, while major improvements are capitalized. Depreciation is computed for financial reporting purposes principally by use of the straight-line method over the following estimated useful lives: machinery and equipment, 3 - 15 years; buildings, 10 - 30 years; and land improvements, 5 - 15 years. Depreciation expense was approximately $13.2 million in <em style="font: inherit;">2020,</em> $12.5 million in <em style="font: inherit;">2019</em> and $11.6 million in <em style="font: inherit;">2018</em> and reflected in cost of sales and selling, general and administrative expense (“SG&A expense”) in the consolidated statements of operations. Capitalized software is amortized over the shorter of the estimated useful life or 5 years and reflected in SG&A expense. <span style="-sec-ix-hidden:c65760405"><span style="-sec-ix-hidden:c65760406"><span style="-sec-ix-hidden:c65760407">No</span></span></span> interest costs were capitalized in <em style="font: inherit;">2020,</em> <em style="font: inherit;">2019</em> and <em style="font: inherit;">2018.</em></p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p>
CY2020	us-gaap	Depreciation Depreciation	13200000	USD
CY2019	us-gaap	Depreciation Depreciation	12500000	USD
CY2018	us-gaap	Depreciation Depreciation	11600000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	300000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	1695000	USD
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	1299000	USD
CY2020	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	225000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	171000	USD
CY2020Q4	us-gaap	Restructuring And Related Cost Expected Cost1 RestructuringAndRelatedCostExpectedCost1	700000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	13780000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5213000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8567000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	12810000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4200000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8610000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1000000.0	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1100000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1300000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	910000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	822000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	757000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	751000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	744000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	66000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	65000	USD
CY2020Q4	iiin	Amortization Of Financing Costs Next12 Months AmortizationOfFinancingCostsNext12Months	65000	USD
CY2020Q4	iiin	Amortization Of Financing Costs Year2 AmortizationOfFinancingCostsYear2	65000	USD
CY2020Q4	iiin	Amortization Of Financing Costs Year3 AmortizationOfFinancingCostsYear3	65000	USD
CY2020Q4	iiin	Amortization Of Financing Costs Year4 AmortizationOfFinancingCostsYear4	41000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	367000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M8D
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	8.05
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	7.15
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	12.06
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	392000
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	23.40
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	77000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	34.84
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	196000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	19.68
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	3866000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	9000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	29.88
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	264000
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	29.25
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	129000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	19.74
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	5000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	23.95
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	21000	USD
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	388000
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	26.16
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	121000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	21.08
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	27000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	25.88
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	482000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	24.90
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y6M
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	160000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	477000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	24.95
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P6Y5M19D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	159000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	283000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	26.99
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y8M8D
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	133000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.015	pure
CY2020	iiin	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Cares Act EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackCaresAct	-223000	USD
CY2020	iiin	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Cares Act Percent EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackCaresActPercent	-0.009	pure
CY2019	iiin	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Cares Act EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackCaresAct	0	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5056000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-126000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8265000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	529000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	185000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	906000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	5585000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	59000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9171000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-288000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1649000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2862000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-136000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	149000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	55000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-424000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1798000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2807000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5161000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1857000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6364000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.214	pure
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.249	pure
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.149	pure
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5076000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1566000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	10444000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245	pure
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	319000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.013	pure
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	297000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.040	pure
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	739000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.017	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	128000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.005	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	90000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.012	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-634000	USD
CY2019	iiin	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Cares Act Percent EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackCaresActPercent	0	pure
CY2018	iiin	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Cares Act EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackCaresAct	0	USD
CY2018	iiin	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Cares Act Percent EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackCaresActPercent	0	pure
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-50000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.002	pure
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	24000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.003	pure
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-18000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.000	pure
CY2020	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	0	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0	pure
CY2019	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-142000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.019	pure
CY2018	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-147000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.003	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	-3307000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	-0.078	pure
CY2020	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	-0	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0	pure
CY2019	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	-0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0	pure
CY2018	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	832000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.020	pure
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-89000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003	pure
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	22000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003	pure
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	119000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003	pure
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5161000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.214	pure
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1857000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.249	pure
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6364000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.149	pure
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	2727000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	2661000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	1885000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	1207000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1328000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1259000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	568000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	92000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	120000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	0	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	363000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	207000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	257000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	6393000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5353000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	10766000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	10625000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1217000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1311000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	566000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	-0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	412000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	317000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	12961000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	12253000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6568000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6900000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.245	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2018	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	3300000	USD
CY2020	iiin	Income Tax Benefit Cares Act IncomeTaxBenefitCaresAct	223000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6600000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	207000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	50000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Amortization Of Gain Loss Next Fiscal Year DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear	215000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2633000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1290000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	103000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	255000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	570000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	570000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	530000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	892000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	4109000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	1300000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	1600000	USD
CY2018	us-gaap	Operating Lease Expense OperatingLeaseExpense	1500000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	1301000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1771000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P2Y3M18D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.044	pure
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	874000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	408000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	59000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2000	USD
CY2020	us-gaap	Revenues Revenues	472618000	USD
CY2019	us-gaap	Revenues Revenues	455713000	USD
CY2018	us-gaap	Revenues Revenues	453217000	USD
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	140588000	USD
CY2019Q3	us-gaap	Noncurrent Assets NoncurrentAssets	132074000	USD
CY2018Q3	us-gaap	Noncurrent Assets NoncurrentAssets	133913000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	19009000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	5598000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	36266000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19278000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19243000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19079000
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	105000
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	97000
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	198000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19383000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19340000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19277000
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.99
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.90
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.98
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.88
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	369000
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	240000
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	83000
CY2020	us-gaap	Revenues Revenues	472618000	USD
CY2019	us-gaap	Revenues Revenues	455713000	USD
CY2018	us-gaap	Revenues Revenues	453217000	USD
CY2019	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	716000	USD
CY2018	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	699000	USD
CY2020	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	0	USD
CY2020Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	54108000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	44436000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	291000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	254000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	53817000	USD
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	44182000	USD
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	31553000	USD
CY2019Q3	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	27667000	USD
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	3813000	USD
CY2019Q3	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	4885000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	33597000	USD
CY2019Q3	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	38299000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	68963000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	70851000	USD
CY2020Q4	us-gaap	Prepaid Insurance PrepaidInsurance	4096000	USD
CY2019Q3	us-gaap	Prepaid Insurance PrepaidInsurance	4545000	USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	USD
CY2019Q3	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1215000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	1474000	USD
CY2019Q3	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	1610000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	5570000	USD
CY2019Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	7370000	USD
CY2020Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	10584000	USD
CY2019Q3	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	10211000	USD
CY2020Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	7778000	USD
CY2019Q3	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	0	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2522000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2020Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	170000	USD
CY2019Q3	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	237000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	106000	USD
CY2019Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	114000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	21160000	USD
CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	10562000	USD
CY2020Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	14520000	USD
CY2019Q3	us-gaap	Land And Land Improvements LandAndLandImprovements	14548000	USD
CY2020Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	52462000	USD
CY2019Q3	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	56404000	USD
CY2020Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	172617000	USD
CY2019Q3	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	165609000	USD
CY2020Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	3978000	USD
CY2019Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	5285000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	243577000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	241846000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	142185000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	136886000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	101392000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	104960000	USD
CY2020Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	4971000	USD
CY2019Q3	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	2463000	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1726000	USD
CY2019Q3	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1820000	USD
CY2020Q4	us-gaap	Customer Refund Liability Current CustomerRefundLiabilityCurrent	1581000	USD
CY2019Q3	us-gaap	Customer Refund Liability Current CustomerRefundLiabilityCurrent	1381000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	1201000	USD
CY2019Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	0	USD
CY2020Q4	iiin	Acquisition Holdback Payable Current AcquisitionHoldbackPayableCurrent	1000000	USD
CY2019Q3	iiin	Acquisition Holdback Payable Current AcquisitionHoldbackPayableCurrent	0	USD
CY2020Q4	us-gaap	Sales And Excise Tax Payable Current SalesAndExciseTaxPayableCurrent	544000	USD
CY2019Q3	us-gaap	Sales And Excise Tax Payable Current SalesAndExciseTaxPayableCurrent	136000	USD
CY2020Q4	iiin	Accrued Sales Allowance Reserves Current AccruedSalesAllowanceReservesCurrent	0	USD
CY2019Q3	iiin	Accrued Sales Allowance Reserves Current AccruedSalesAllowanceReservesCurrent	544000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2464000	USD
CY2019Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	474000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	14717000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	6818000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	11553000	USD
CY2019Q3	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	11679000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6568000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6900000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	19421000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	18579000	USD
CY2008Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	25000000.0	USD
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	24800000	USD
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2019Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	254000	USD
CY2018Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	295000	USD
CY2017Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	201000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	65000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	-41000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Adjustments ValuationAllowancesAndReservesAdjustments	100000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	28000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	-0	USD
CY2018	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	6000	USD
CY2020Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	291000	USD
CY2019Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	254000	USD
CY2018Q3	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	295000	USD

Files In Submission

Name	View Source	Status
0001437749-20-021957-index-headers.html	Edgar Link	pending
0001437749-20-021957-index.html	Edgar Link	pending
0001437749-20-021957.txt	Edgar Link	pending
0001437749-20-021957-xbrl.zip	Edgar Link	pending
ex_207687.htm	Edgar Link	pending
ex_207688.htm	Edgar Link	pending
ex_207689.htm	Edgar Link	pending
ex_207690.htm	Edgar Link	pending
ex_207691.htm	Edgar Link	pending
ex_207692.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
graph.jpg	Edgar Link	pending
iiin-20201003.xsd	Edgar Link	pending
iiin-20201003_cal.xml	Edgar Link	unprocessable
iiin-20201003_def.xml	Edgar Link	unprocessable
iiin-20201003_lab.xml	Edgar Link	unprocessable
iiin-20201003_pre.xml	Edgar Link	unprocessable
iiin20201003_10k.htm	Edgar Link	pending
iiin20201003_10k_htm.xml	Edgar Link	completed
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$IIIN
INSTEEL INDUSTRIES INC Stock $iiin

2020 Q4 Form 10-K Financial Statement

#000143774920021957 Filed on October 29, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IIIN INSTEEL INDUSTRIES INC Stock $iiin

2020 Q4 Form 10-K Financial Statement

#000143774920021957 Filed on October 29, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IIIN
INSTEEL INDUSTRIES INC Stock $iiin