$NPK
NATIONAL PRESTO INDUSTRIES INC Stock $npk

$npk Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000143774922006042 Filed on March 11, 2022

Income Statement

Concept	2021 Q4	2021 Q1	2021
Revenue	$100.4M	$81.03M	$355.8M
YoY Change	-5.21%	23.45%	0.89%
Cost Of Revenue	$76.00M		$291.4M
YoY Change	-4.53%		8.84%
Gross Profit	$17.13M	$18.36M	$64.40M
YoY Change	-34.98%	13.92%	-24.17%
Gross Profit Margin	17.06%	22.66%	18.1%
Selling, General & Admin	$6.541M		$34.15M
YoY Change	-28.12%		19.81%
% of Gross Profit	38.18%		53.04%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$763.0K		$2.978M
YoY Change	0.39%		-0.9%
% of Gross Profit	4.45%		4.62%
Operating Expenses	$6.541M		$34.15M
YoY Change	-28.9%		19.81%
Operating Profit	$4.635M		$30.03M
YoY Change	-72.96%		-46.56%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net	$645.0K		$2.430M
YoY Change	-19.38%		-35.92%
Pretax Income	$5.280M		$32.46M
YoY Change	-70.5%		-45.89%
Income Tax	$1.151M		$6.805M
% Of Pretax Income	21.8%		20.96%
Net Earnings	$3.240M	$8.993M	$25.65M
YoY Change	-76.76%	9.38%	-45.37%
Net Earnings / Revenue	3.23%	11.1%	7.21%
Basic Earnings Per Share	$0.58	$1.28	$3.63
Diluted Earnings Per Share	$584.7K		$3.634M
COMMON SHARES
Basic Shares Outstanding	7.040M	7.026M	7.060M
Diluted Shares Outstanding

Balance Sheet

Concept	2021 Q4	2021
SHORT-TERM ASSETS
Cash & Short-Term Investments	$124.3M	$144.0M
YoY Change	-19.79%	-7.1%
Cash & Equivalents	$109.8M	$109.8M
Short-Term Investments	$33.31M	$34.19M
Other Short-Term Assets	$4.490M	$4.490M
YoY Change	-55.98%	-55.98%
Inventory	$143.9M	$143.9M
Prepaid Expenses
Receivables	$53.38M	$53.38M
Other Receivables	$2.486M	$2.330M
Total Short-Term Assets	$348.1M	$348.1M
YoY Change	-2.57%	-2.56%
LONG-TERM ASSETS
Property, Plant & Equipment	$36.72M	$46.88M
YoY Change	-1.05%	15.76%
Goodwill	$15.32M
YoY Change	0.0%
Intangibles	$2.624M
YoY Change	-7.54%
Long-Term Investments
YoY Change
Other Assets	$2.878M	$7.520M
YoY Change	-58.33%	-24.04%
Total Long-Term Assets	$72.35M	$72.35M
YoY Change	-4.72%	-4.81%
TOTAL ASSETS
Total Short-Term Assets	$348.1M	$348.1M
Total Long-Term Assets	$72.35M	$72.35M
Total Assets	$420.4M	$420.4M
YoY Change	-2.95%	-2.96%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$32.76M	$30.55M
YoY Change	-2.14%	6.07%
Accrued Expenses	$16.69M	$17.24M
YoY Change	2.6%	2.6%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$53.16M	$53.16M
YoY Change	-3.51%	-3.52%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$7.441M	$9.616M
YoY Change	691.6%	159.89%
Total Long-Term Liabilities	$7.441M	$9.616M
YoY Change	691.6%	159.89%
TOTAL LIABILITIES
Total Short-Term Liabilities	$53.16M	$53.16M
Total Long-Term Liabilities	$7.441M	$9.616M
Total Liabilities	$62.78M	$62.78M
YoY Change	6.72%	6.76%
SHAREHOLDERS EQUITY
Retained Earnings	$349.2M
YoY Change	-5.01%
Common Stock	$21.18M
YoY Change	6.56%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$12.78M
YoY Change	-4.0%
Treasury Stock Shares	$398.2K
Shareholders Equity	$357.6M	$357.6M
YoY Change
Total Liabilities & Shareholders Equity	$420.4M	$420.4M
YoY Change	-2.95%	-2.96%

Cashflow Statement

Concept	2021 Q4	2021 Q1	2021
OPERATING ACTIVITIES
Net Income	$3.240M	$8.993M	$25.65M
YoY Change	-76.76%	9.38%	-45.37%
Depreciation, Depletion And Amortization	$763.0K		$2.978M
YoY Change	0.39%		-0.9%
Cash From Operating Activities	$8.466M		$34.69M
YoY Change	-74.12%		-15.34%
INVESTING ACTIVITIES
Capital Expenditures	-$513.0K		$2.866M
YoY Change	-54.2%		9.35%
Acquisitions			$0.00
YoY Change
Other Investing Activities	$10.01M		$35.41M
YoY Change	-0.21%		262.11%
Cash From Investing Activities	$9.496M		$32.55M
YoY Change	6.7%		354.9%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.000K		-$43.47M
YoY Change			4.31%
NET CHANGE
Cash From Operating Activities	8.466M		$34.69M
Cash From Investing Activities	9.496M		$32.55M
Cash From Financing Activities	-1.000K		-$43.47M
Net Change In Cash	17.96M		$23.77M
YoY Change	-56.83%		268.11%
FREE CASH FLOW
Cash From Operating Activities	$8.466M		$34.69M
Capital Expenditures	-$513.0K		$2.866M
Free Cash Flow	$8.979M		$31.82M
YoY Change	-73.46%		-17.03%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	12000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	12000000
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	7440518
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	7440518
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	7042274
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	7025433
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	398244
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	415085
CY2019	npk	Regular Dividends Per Share Paid RegularDividendsPerSharePaid	1.00
CY2019	npk	Extra Dividends Per Share Paid ExtraDividendsPerSharePaid	5.00
CY2020	npk	Regular Dividends Per Share Paid RegularDividendsPerSharePaid	1.00
CY2020	npk	Extra Dividends Per Share Paid ExtraDividendsPerSharePaid	5.00
CY2021	npk	Regular Dividends Per Share Paid RegularDividendsPerSharePaid	1.00
CY2021	npk	Extra Dividends Per Share Paid ExtraDividendsPerSharePaid	5.25
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	143861000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	10199000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	348053000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	357240000	USD
CY2021Q4	us-gaap	Land Land	3036000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2021	npk	Debt Securities Available For Sale Number Of Days To Tender DebtSecuritiesAvailableForSaleNumberOfDaysToTender	P7D
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021Q4	us-gaap	Goodwill Goodwill	15317000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	15317000	USD
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2021	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2019	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2142000	USD
CY2021	npk	Expected Prepayment Utilization Period ExpectedPrepaymentUtilizationPeriod	P2Y
CY2021	npk	Supply Commitment Commitment Term SupplyCommitmentCommitmentTerm	P5Y
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3832000	USD
CY2020Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1247000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	109805000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	86036000	USD
CY2021Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	34190000	USD
CY2020Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	68981000	USD
CY2021Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	53715000	USD
CY2020Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	53979000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	338000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	53377000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	312000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	53667000	USD
CY2021Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	40624000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	31440000	USD
CY2021Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	92437000	USD
CY2020Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	96463000	USD
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	10800000	USD
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	7585000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	135488000	USD
CY2021Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	2330000	USD
CY2020Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	2869000	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	4490000	USD
CY2020Q4	us-gaap	Land Land	3008000	USD
CY2021Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	49467000	USD
CY2020Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	48706000	USD
CY2021Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	46070000	USD
CY2020Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	44774000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	98573000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	96488000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	61850000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	36723000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	59375000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	37113000	USD
CY2021Q4	us-gaap	Goodwill Goodwill	15317000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	15317000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2624000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2838000	USD
CY2020Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	7399000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10161000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3363000	USD
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	4642000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2994000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2878000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6906000	USD
CY2021Q4	us-gaap	Assets Assets	420398000	USD
CY2020Q4	us-gaap	Assets Assets	433170000	USD
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	32759000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	33474000	USD
CY2021Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	3163000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	4777000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	546000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	573000	USD
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	16691000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	16268000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	53159000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	55092000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9616000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	2790000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	940000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	62775000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	58822000	USD
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	7441000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	7441000	USD
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	13743000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	12438000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	349198000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	367627000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	20000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	154000	USD
CY2021Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	370402000	USD
CY2020Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	387660000	USD
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	12779000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	13312000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	357623000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	374348000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	420398000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	433170000	USD
CY2021	us-gaap	Revenues Revenues	355777000	USD
CY2020	us-gaap	Revenues Revenues	352627000	USD
CY2019	us-gaap	Revenues Revenues	308510000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	291381000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	267705000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	236585000	USD
CY2021	us-gaap	Gross Profit GrossProfit	64396000	USD
CY2020	us-gaap	Gross Profit GrossProfit	84922000	USD
CY2019	us-gaap	Gross Profit GrossProfit	71925000	USD
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	34153000	USD
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	7038000
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	7018000
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	3.63
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	6.67
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	5.78
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.24
CY2021	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	3.63
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	6.67
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	6.02
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	46958000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	42220000	USD
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-134000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	18000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	115000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	28505000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	25462000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	214000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	221000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	83000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	30029000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	56196000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	46380000	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2430000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3792000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5926000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	32459000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	59988000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	52306000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6805000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13030000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11766000	USD
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	25654000	USD
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	46958000	USD
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	40540000	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	1680000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	46958000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	42220000	USD
CY2021	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	7060000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	25520000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	46976000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	42335000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	46958000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	42220000	USD
CY2021	us-gaap	Depreciation Depreciation	2764000	USD
CY2020	us-gaap	Depreciation Depreciation	2784000	USD
CY2019	us-gaap	Depreciation Depreciation	3606000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	214000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	221000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	83000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1612000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1718000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-224000	USD
CY2019	us-gaap	Other Noncash Income Tax Expense OtherNoncashIncomeTaxExpense	1370000	USD
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-493000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-2000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-322000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7665000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7000	USD
CY2021	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	823000	USD
CY2019	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	0	USD
CY2021	npk	Noncash Retirement Plan Expense NoncashRetirementPlanExpense	752000	USD
CY2020	npk	Noncash Retirement Plan Expense NoncashRetirementPlanExpense	721000	USD
CY2019	npk	Noncash Retirement Plan Expense NoncashRetirementPlanExpense	680000	USD
CY2019	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	2300000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-100000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-131000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-464000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1083000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	12203000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-10915000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	10139000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	6952000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	34241000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-9737000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5655000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2803000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1232000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	15706000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-11561000	USD
CY2021	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-1614000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	978000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	1045000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	34688000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	40973000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9583000	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	3918000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	48047000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	105409000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	38539000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	57823000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	161420000	USD
CY2021	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	0	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2866000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2621000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3138000	USD
CY2021	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	543000	USD
CY2020	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	0	USD
CY2019	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	2146000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	USD
CY2021	us-gaap	Advertising Expense AdvertisingExpense	150000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	2655000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	241000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	245000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3733000	USD
CY2021	npk	Proceeds From Legal Settlements Investing Activities ProceedsFromLegalSettlementsInvestingActivities	0	USD
CY2020	npk	Proceeds From Legal Settlements Investing Activities ProceedsFromLegalSettlementsInvestingActivities	0	USD
CY2019	npk	Proceeds From Legal Settlements Investing Activities ProceedsFromLegalSettlementsInvestingActivities	2300000	USD
CY2021	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	250000	USD
CY2020	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	USD
CY2019	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	807000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	767000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	32548000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	7155000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	55160000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	44083000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	42172000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	42087000	USD
CY2021	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	571000	USD
CY2020	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	528000	USD
CY2019	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	518000	USD
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	45000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-27000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-442000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-43467000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-41671000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-42011000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	23769000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	6457000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	22732000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	86036000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	79579000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	56847000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	109805000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	86036000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	79579000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	10071000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	13803000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	10187000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	366123000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	42220000	USD
CY2019	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	115000	USD
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	42087000	USD
CY2019	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	1586000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	367957000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	46958000	USD
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	18000	USD
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	42172000	USD
CY2020	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	1587000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	374348000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	USD
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-134000	USD
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	44083000	USD
CY2021	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	1838000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	357623000	USD
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	263000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	814000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	303000	USD
CY2021	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	837000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	(<em style="font: inherit;">1</em>) USE OF ESTIMATES IN THE PREPARATION OF FINANCIAL STATEMENTS: In preparation of the Company's Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and related revenues and expenses. Actual results could differ from the estimates used by management.
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="font-family: Times New Roman; font-size: 10pt; margin: 0pt 0pt 0pt 36pt; text-align: left; text-indent: -18pt;"/> <p style="font-family: Times New Roman; font-size: 10pt; margin: 0pt 0pt 0pt 36pt; text-align: left; text-indent: -18pt;">(<em style="font: inherit;">4</em>) RECLASSIFICATIONS: Certain reclassifications have been made to the prior periods' financial statements to conform to the current period's financial statement presentation. These reclassifications did <em style="font: inherit;">not</em> affect net earnings or stockholder' equity as previously reported. </p>
CY2021Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	3378000	USD
CY2020Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	4510000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	2142000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	518000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	304000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	214000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	221000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	83000	USD
CY2021	npk	Initial Product Return Period InitialProductReturnPeriod	P60D
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	7285000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1478000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	4175000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	21252000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	34164000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	34190000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	31000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	5000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	68785000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	68981000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	196000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	38539000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	57823000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	161420000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	170000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	24000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	145000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	214000	USD
CY2020	npk	Contract With Customer Liability Decrease From Product Recall ContractWithCustomerLiabilityDecreaseFromProductRecall	2073000	USD
CY2020	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	325000	USD
CY2021Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	218000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	241000	USD
CY2021Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	35804000	USD
CY2020Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	30515000	USD
CY2021Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	14174000	USD
CY2020Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	4429000	USD
CY2021	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	0	USD
CY2020	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	2215000	USD
CY2019	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	85000	USD
CY2021	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	-9745000	USD
CY2021	us-gaap	Inventory Lifo Reserve Effect On Income Net InventoryLIFOReserveEffectOnIncomeNet	7698000	USD
CY2021	npk	Inventory Lifo Reserve Effect On Earnings Per Share InventoryLifoReserveEffectOnEarningsPerShare	1.09
CY2020	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	-447000	USD
CY2020	us-gaap	Inventory Lifo Reserve Effect On Income Net InventoryLIFOReserveEffectOnIncomeNet	349000	USD
CY2020	npk	Inventory Lifo Reserve Effect On Earnings Per Share InventoryLifoReserveEffectOnEarningsPerShare	0.05
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	1187000	USD
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	970000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1019000	USD
CY2019	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	42000	USD
CY2019	us-gaap	Inventory Lifo Reserve Effect On Income Net InventoryLIFOReserveEffectOnIncomeNet	-34000	USD
CY2021Q4	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	108057000	USD
CY2020Q4	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	104973000	USD
CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	4820000	USD
CY2021Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	92437000	USD
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	10800000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	925000	USD
CY2020Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	96463000	USD
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	7585000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	7515000	USD
CY2021Q4	us-gaap	Loss Contingency Accrual Product Liability Gross LossContingencyAccrualProductLiabilityGross	5713000	USD
CY2021Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	1191000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	1000000	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1272000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	7474000	USD
CY2020Q4	us-gaap	Loss Contingency Accrual Product Liability Gross LossContingencyAccrualProductLiabilityGross	5618000	USD
CY2021Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	498091
CY2021	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	292
CY2020	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	344
CY2019	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	4584
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	14748000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	11990000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-819000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1210000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-179000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11453000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1742000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1816000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	537000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8417000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-793000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-508000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-45000	USD
CY2021Q4	npk	Share Based Compensation Arrangement Number Of Plan Participants ShareBasedCompensationArrangementNumberOfPlanParticipants	32	pure
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	469000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	366000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	830000	USD
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	1636000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y9M18D
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6675000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	12932000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1612000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1718000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-224000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6805000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13030000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11766000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.023	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.017	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.007	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.001	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.001	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.001	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.022	pure
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.009	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.009	pure
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.210	pure
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.217	pure
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.225	pure
CY2021Q4	npk	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsStateAndLocal	2153000	USD
CY2020Q4	npk	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsStateAndLocal	825000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1928000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	69000	USD
CY2021Q4	npk	Deferred Tax Assets Insurance DeferredTaxAssetsInsurance	1073000	USD
CY2020Q4	npk	Deferred Tax Assets Insurance DeferredTaxAssetsInsurance	978000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences	855000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences	813000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	803000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	754000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	73000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Warranty Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves	610000	USD
CY2021Q4	npk	Deferred Tax Assets Payroll Taxes DeferredTaxAssetsPayrollTaxes	228000	USD
CY2020Q4	npk	Deferred Tax Assets Payroll Taxes DeferredTaxAssetsPayrollTaxes	414000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1201000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	678000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	8314000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	5141000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1695000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2375000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2521000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	169000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	142000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	298000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	520000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	6619000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	4621000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	1974000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	1585000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	42000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1977000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1627000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4642000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2994000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1695000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2375000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2521000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2237000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	336000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	944000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	30000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	46000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	512000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	706000	USD
CY2021Q4	npk	Number Of Entity Employees Union Members NumberOfEntityEmployeesUnionMembers	205	pure
CY2021Q4	npk	Percentage Of Entity Employees Union Members PercentageOfEntityEmployeesUnionMembers	0.23	pure
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	1000000	USD
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	970000	USD
CY2021	npk	Shortterm And Variable Lease Cost ShorttermAndVariableLeaseCost	252000	USD
CY2020	npk	Shortterm And Variable Lease Cost ShorttermAndVariableLeaseCost	452000	USD
CY2019	npk	Shortterm And Variable Lease Cost ShorttermAndVariableLeaseCost	225000	USD
CY2021	us-gaap	Lease Cost LeaseCost	1190000	USD
CY2020	us-gaap	Lease Cost LeaseCost	1181000	USD
CY2019	us-gaap	Lease Cost LeaseCost	916000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due Within One Year AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear	230000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Second Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear	138000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Third Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear	126000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fourth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear	115000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear	103000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due After Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear	288000	USD
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	1000000	USD
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	pure
CY2021	npk	Government Contract Number Of Contractors GovernmentContractNumberOfContractors	2	pure
CY2021	us-gaap	Revenues Revenues	355777000	USD
CY2021	us-gaap	Gross Profit GrossProfit	64396000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	30029000	USD
CY2021Q4	us-gaap	Assets Assets	420398000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2978000	USD
CY2021	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2866000	USD
CY2020	us-gaap	Revenues Revenues	352627000	USD
CY2020	us-gaap	Gross Profit GrossProfit	84922000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	56196000	USD
CY2020Q4	us-gaap	Assets Assets	433170000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3005000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2621000	USD
CY2019	us-gaap	Revenues Revenues	308510000	USD
CY2019	us-gaap	Gross Profit GrossProfit	71925000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	46380000	USD
CY2019Q4	us-gaap	Assets Assets	410253000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3689000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3138000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	3832000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	938000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	729000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	691000	USD
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	1076000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	1182000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	1114000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	1190000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	1181000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	916000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P22Y8M12D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.046	pure
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	807000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	682000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	631000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	625000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	605000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	13972000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	17322000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	7160000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10162000	USD
CY2021	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	1971000	USD
CY2020	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	1967000	USD
CY2019	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	1788000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	1843000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	1837000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	1837000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	1837000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	1837000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	11022000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	20213000	USD
CY2021Q1	us-gaap	Revenues Revenues	81027000	USD
CY2021Q1	us-gaap	Gross Profit GrossProfit	18361000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	8993000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.28
CY2021Q2	us-gaap	Revenues Revenues	87118000	USD
CY2021Q2	us-gaap	Gross Profit GrossProfit	17675000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	9292000	USD
CY2021Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.32
CY2021Q3	us-gaap	Revenues Revenues	87225000	USD
CY2021Q3	us-gaap	Gross Profit GrossProfit	11230000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	4129000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.58
CY2021Q4	us-gaap	Revenues Revenues	100407000	USD
CY2021Q4	us-gaap	Gross Profit GrossProfit	17130000	USD
CY2021Q4	us-gaap	Net Income Loss NetIncomeLoss	3240000	USD
CY2021Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.45
CY2021	us-gaap	Revenues Revenues	355777000	USD
CY2021	us-gaap	Gross Profit GrossProfit	64396000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	USD
CY2021	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	3.63
CY2020Q1	us-gaap	Revenues Revenues	65636000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	16117000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	8222000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.17
CY2020Q2	us-gaap	Revenues Revenues	87132000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	21743000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	12657000	USD
CY2020Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.80
CY2020Q3	us-gaap	Revenues Revenues	93937000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	20718000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	12138000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.72
CY2020Q4	us-gaap	Revenues Revenues	105922000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	26344000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	13941000	USD
CY2020Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	1.98
CY2020	us-gaap	Revenues Revenues	352627000	USD
CY2020	us-gaap	Gross Profit GrossProfit	84922000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	46958000	USD
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	6.67
CY2021Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1247000	USD
CY2019	npk	Business Combination Pro Forma Information Revenue Net Of Sales Deductions Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueNetOfSalesDeductionsOfAcquireeSinceAcquisitionDateActual	-38000	USD
CY2019	us-gaap	Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual	-1103000	USD
CY2021Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	7615000	USD
CY2020Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	7399000	USD

Files In Submission

Name	View Source	Status
0001437749-22-006042-index-headers.html	Edgar Link	pending
0001437749-22-006042-index.html	Edgar Link	pending
0001437749-22-006042.txt	Edgar Link	pending
0001437749-22-006042-xbrl.zip	Edgar Link	pending
ex_320248.htm	Edgar Link	pending
ex_320249.htm	Edgar Link	pending
ex_320250.htm	Edgar Link	pending
ex_320251.htm	Edgar Link	pending
ex_320252.htm	Edgar Link	pending
ex_320253.htm	Edgar Link	pending
ex_344795.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
npk-20211231.xsd	Edgar Link	pending
npk-20211231_cal.xml	Edgar Link	unprocessable
npk-20211231_def.xml	Edgar Link	unprocessable
npk-20211231_lab.xml	Edgar Link	unprocessable
npk-20211231_pre.xml	Edgar Link	unprocessable
npk20211231_10k.htm	Edgar Link	pending
npk20211231_10k_htm.xml	Edgar Link	completed
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$NPK
NATIONAL PRESTO INDUSTRIES INC Stock $npk

2021 Q4 Form 10-K Financial Statement

#000143774922006042 Filed on March 11, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NPK NATIONAL PRESTO INDUSTRIES INC Stock $npk

2021 Q4 Form 10-K Financial Statement

#000143774922006042 Filed on March 11, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NPK
NATIONAL PRESTO INDUSTRIES INC Stock $npk