$NPK
NATIONAL PRESTO INDUSTRIES INC Stock $npk

$npk Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000143774924008099 Filed on March 15, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023 Q1
Revenue	$76.65M	$83.14M	$80.41M
YoY Change	-4.67%	19.31%	32.35%
Cost Of Revenue	$62.80M	$67.74M
YoY Change		28.74%
Gross Profit	$13.85M	$15.40M	$18.02M
YoY Change	-23.12%	-9.75%	85.56%
Gross Profit Margin	18.07%	18.52%	22.41%
Selling, General & Admin	$7.197M	$7.904M
YoY Change		21.86%
% of Gross Profit	51.95%	51.33%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.474M	$1.193M
YoY Change		-14.42%
% of Gross Profit	10.64%	7.75%
Operating Expenses	$7.197M	$7.904M
YoY Change		21.86%
Operating Profit	$6.277M	$7.068M
YoY Change		-32.67%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net	$2.075M	$1.775M
YoY Change		63.59%
Pretax Income	$8.352M	$8.843M
YoY Change		-23.66%
Income Tax	$1.784M	$1.824M
% Of Pretax Income	21.36%	20.63%
Net Earnings	$6.568M	$7.019M	$8.878M
YoY Change	-26.02%	-21.37%	204.56%
Net Earnings / Revenue	8.57%	8.44%	11.04%
Basic Earnings Per Share	$0.92	$0.99	$1.25
Diluted Earnings Per Share	$0.92	$0.99
COMMON SHARES
Basic Shares Outstanding	7.117M	7.108M	7.065M
Diluted Shares Outstanding

Balance Sheet

Concept	2024 Q1	2023 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$87.92M	$95.40M
YoY Change		-9.57%
Cash & Equivalents	$63.55M	$70.41M
Short-Term Investments	$24.37M	$25.00M
Other Short-Term Assets	$6.821M	$4.742M
YoY Change		-22.36%
Inventory	$204.0M	$182.9M
Prepaid Expenses
Receivables	$38.10M	$49.10M
Other Receivables	$1.470M	$1.700M
Total Short-Term Assets	$338.3M	$333.8M
YoY Change		-0.85%
LONG-TERM ASSETS
Property, Plant & Equipment	$38.52M	$40.60M
YoY Change		12.34%
Goodwill	$19.43M	$19.43M
YoY Change		26.87%
Intangibles	$4.912M	$5.670M
YoY Change		107.77%
Long-Term Investments
YoY Change
Other Assets	$5.803M	$1.283M
YoY Change		25.29%
Total Long-Term Assets	$79.16M	$82.17M
YoY Change		16.06%
TOTAL ASSETS
Total Short-Term Assets	$338.3M	$333.8M
Total Long-Term Assets	$79.16M	$82.17M
Total Assets	$417.5M	$416.0M
YoY Change		2.09%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$32.62M	$44.36M
YoY Change		43.2%
Accrued Expenses	$36.11M	$16.27M
YoY Change		-3.41%
Deferred Revenue		$13.67M
YoY Change		141.45%
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$73.73M	$63.42M
YoY Change		22.82%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$7.441M	$7.441M
YoY Change		0.0%
Total Long-Term Liabilities	$7.441M	$7.441M
YoY Change		0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$73.73M	$63.42M
Total Long-Term Liabilities	$7.441M	$7.441M
Total Liabilities	$85.82M	$73.29M
YoY Change		18.36%
SHAREHOLDERS EQUITY
Retained Earnings	$318.8M	$331.1M
YoY Change		-1.43%
Common Stock	$16.50M	$15.79M
YoY Change		8.25%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$331.6M	$342.7M
YoY Change
Total Liabilities & Shareholders Equity	$417.5M	$416.0M
YoY Change		2.09%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023 Q1
OPERATING ACTIVITIES
Net Income	$6.568M	$7.019M	$8.878M
YoY Change	-26.02%	-21.37%	204.56%
Depreciation, Depletion And Amortization	$1.474M	$1.193M
YoY Change		-14.42%
Cash From Operating Activities	$5.555M	-$4.210M
YoY Change		259.22%
INVESTING ACTIVITIES
Capital Expenditures	$389.0K	$760.0K
YoY Change		-445.45%
Acquisitions
YoY Change
Other Investing Activities	$2.257M	$2.030M
YoY Change		-151.81%
Cash From Investing Activities	$1.868M	$1.260M
YoY Change		-130.45%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$31.53M	0.000
YoY Change		-100.0%
NET CHANGE
Cash From Operating Activities	$5.555M	-4.210M
Cash From Investing Activities	$1.868M	1.260M
Cash From Financing Activities	-$31.53M	0.000
Net Change In Cash	-$24.11M	-2.950M
YoY Change		-44.39%
FREE CASH FLOW
Cash From Operating Activities	$5.555M	-$4.210M
Capital Expenditures	$389.0K	$760.0K
Free Cash Flow	$5.166M	-$4.970M
YoY Change		422.06%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	12000000
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	12000000
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	7440518
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	7440518
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	7084384
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	7062872
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	356134
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	377646
CY2021	npk	Regular Dividends Per Share Paid RegularDividendsPerSharePaid	1
CY2021	npk	Extra Dividends Per Share Paid ExtraDividendsPerSharePaid	5.25
CY2022	npk	Regular Dividends Per Share Paid RegularDividendsPerSharePaid	1
CY2022	npk	Extra Dividends Per Share Paid ExtraDividendsPerSharePaid	3.5
CY2023	npk	Regular Dividends Per Share Paid RegularDividendsPerSharePaid	1
CY2023	npk	Extra Dividends Per Share Paid ExtraDividendsPerSharePaid	3
CY2022	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
CY2022	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
CY2023	npk	Debt Securities Available For Sale Number Of Days To Tender DebtSecuritiesAvailableForSaleNumberOfDaysToTender	P7D
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2021	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	usd
CY2022	npk	Supply Commitment Commitment Term SupplyCommitmentCommitmentTerm	P5Y
CY2023Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	0	usd
CY2022Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	0	usd
CY2023	dei	Document Type DocumentType	10-K
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	1-2451
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WI
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	39-0494170
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	3925 North Hastings Way
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Eau Claire
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	WI
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	54703-3703
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-123000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-134000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34684000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	20576000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	25520000	usd
CY2023	dei	City Area Code CityAreaCode	715
CY2023	dei	Local Phone Number LocalPhoneNumber	839-2121
CY2023	dei	Security12b Title Security12bTitle	$1.00 par value common stock
CY2023	dei	Trading Symbol TradingSymbol	NPK
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	374367565	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	7117465
CY2023	dei	Auditor Name AuditorName	RSM US LLP
CY2023	dei	Auditor Location AuditorLocation	Milwaukee, Wisconsin
CY2023	dei	Auditor Firm AuditorFirmId	49
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	87657000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	70711000	usd
CY2023Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	26454000	usd
CY2022Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	24863000	usd
CY2023Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	49323000	usd
CY2022Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	71362000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	596000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	48727000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	338000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	71024000	usd
CY2023Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	31815000	usd
CY2022Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	36249000	usd
CY2023Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	144684000	usd
CY2022Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	105564000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	13921000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	190420000	usd
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	10324000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	152137000	usd
CY2023Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	1629000	usd
CY2022Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	2226000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	5223000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	5671000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	360110000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	326632000	usd
CY2023Q4	us-gaap	Land Land	3107000	usd
CY2022Q4	us-gaap	Land Land	4542000	usd
CY2023Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	52182000	usd
CY2022Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	50904000	usd
CY2023Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	51721000	usd
CY2022Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	49979000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	107010000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	105425000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	67774000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	39236000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	63634000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	41791000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	19433000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	18573000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	5290000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	6926000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10664000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	10731000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	5803000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	5506000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	0	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1688000	usd
CY2023Q4	us-gaap	Assets Assets	440536000	usd
CY2022Q4	us-gaap	Assets Assets	411847000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	38232000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	28944000	usd
CY2023Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	2539000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	2552000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	678000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	577000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	30570000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	21568000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	72019000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	53641000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9986000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	10154000	usd
CY2023Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	2275000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	0	usd
CY2023Q4	us-gaap	Liabilities Liabilities	84280000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	63795000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	7441000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	7441000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	16031000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	14799000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	344245000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	338071000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	22000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-103000	usd
CY2023Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	367739000	usd
CY2022Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	360208000	usd
CY2023Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	11483000	usd
CY2022Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	12156000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	356256000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	348052000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	440536000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	411847000	usd
CY2023	us-gaap	Revenues Revenues	340912000	usd
CY2022	us-gaap	Revenues Revenues	321623000	usd
CY2021	us-gaap	Revenues Revenues	355777000	usd
CY2023	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	273460000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	266498000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	291381000	usd
CY2023	us-gaap	Gross Profit GrossProfit	67452000	usd
CY2022	us-gaap	Gross Profit GrossProfit	55125000	usd
CY2021	us-gaap	Gross Profit GrossProfit	64396000	usd
CY2023	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	30784000	usd
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	27121000	usd
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	34153000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1635000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	582000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	214000	usd
CY2023	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2022	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	5295000	usd
CY2021	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	35033000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	22127000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	30029000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7398000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3817000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2430000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	42431000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25944000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	32459000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7872000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5245000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6805000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	34559000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	20699000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7106
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7081
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7060
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.86
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.92
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.63
CY2023	us-gaap	Net Income Loss NetIncomeLoss	34559000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	20699000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	usd
CY2023	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	125000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	34559000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	20699000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	25654000	usd
CY2023	us-gaap	Depreciation Depreciation	4372000	usd
CY2022	us-gaap	Depreciation Depreciation	2765000	usd
CY2021	us-gaap	Depreciation Depreciation	2764000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1635000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	582000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	214000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1190000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2311000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1612000	usd
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	285000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	0	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7665000	usd
CY2023	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	7000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-463000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-493000	usd
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	5295000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2023	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	0	usd
CY2022	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	151000	usd
CY2021	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	823000	usd
CY2023	npk	Noncash Retirement Plan Expense NoncashRetirementPlanExpense	863000	usd
CY2022	npk	Noncash Retirement Plan Expense NoncashRetirementPlanExpense	803000	usd
CY2021	npk	Noncash Retirement Plan Expense NoncashRetirementPlanExpense	752000	usd
CY2023	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	-0	usd
CY2022	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	492000	usd
CY2021	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	-0	usd
CY2023	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	351000	usd
CY2022	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-0	usd
CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-0	usd
CY2023	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-591000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-514000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-100000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-20337000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	12903000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1083000	usd
CY2023	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	38627000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5620000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	10139000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2137000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-147000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-9737000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	18288000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-676000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1232000	usd
CY2023	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	2497000	usd
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-649000	usd
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1614000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	45389000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8768000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	34688000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	47709000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	20024000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	3918000	usd
CY2023	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	46243000	usd
CY2022	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	29195000	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	38539000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1840000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1030000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2866000	usd
CY2023	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	627000	usd
CY2022	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	106000	usd
CY2021	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	543000	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	24683000	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	usd
CY2023	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	2000000	usd
CY2022	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	usd
CY2021	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	0	usd
CY2023	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	232000	usd
CY2022	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	usd
CY2021	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	250000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-447000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-16436000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	32548000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	28385000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	31826000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	44083000	usd
CY2023	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	429000	usd
CY2022	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	436000	usd
CY2021	us-gaap	Proceeds From Sale Of Treasury Stock ProceedsFromSaleOfTreasuryStock	571000	usd
CY2023	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-40000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-36000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	45000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-27996000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-31426000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-43467000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	16946000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-39094000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	23769000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70711000	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
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	87657000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70711000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	109805000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	6843000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	8208000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	10071000	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
CY2022	us-gaap	Net Income Loss NetIncomeLoss	20699000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-123000	usd
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	31826000	usd
CY2022	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	1679000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	348052000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	34559000	usd
CY2023	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	125000	usd
CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	28385000	usd
CY2023	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	1905000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	356256000	usd
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<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;">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.</p> <p style="font-family: Times New Roman; font-size: 10pt; margin: 0pt 0pt 0pt 36pt; text-align: left;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; margin: 0pt 0pt 0pt 36pt; text-align: left; text-indent: -18pt;"></p>
CY2023	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;">(<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> <p style="font-family: Times New Roman; font-size: 10pt; margin: 0pt 0pt 0pt 36pt; text-align: left;"> </p> <p style="font-family: Times New Roman; font-size: 10pt; margin: 0pt 0pt 0pt 36pt; text-align: left; text-indent: -18pt;"></p>
CY2023Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	5471000	usd
CY2022Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	5454000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	422000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	6926000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	26428000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	26454000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	58000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	31000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	24993000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	24863000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	22000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	152000	usd
CY2023	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	46243000	usd
CY2022	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	29195000	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	38539000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	158000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	156000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	170000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	16330000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	7536000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	2562000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	3832000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	19433000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	18573000	usd
CY2023	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	usd
CY2023Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	7348000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2058000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	5290000	usd
CY2022Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	7348000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1515000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1515000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1260000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	4290000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1635000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	582000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	214000	usd
CY2020	npk	Contract With Customer Liability Decrease From Product Recall ContractWithCustomerLiabilityDecreaseFromProductRecall	2073000	usd
CY2023	us-gaap	Advertising Expense AdvertisingExpense	226000	usd
CY2022	us-gaap	Advertising Expense AdvertisingExpense	209000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	150000	usd
CY2023	npk	Initial Product Return Period InitialProductReturnPeriod	P60D
CY2022Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	521000	usd
CY2021Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	218000	usd
CY2023	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	1548000	usd
CY2022	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	3026000	usd
CY2023	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	1703000	usd
CY2022	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	2723000	usd
CY2023Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	366000	usd
CY2022Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	521000	usd
CY2023Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	29627000	usd
CY2022Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	32994000	usd
CY2023Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	9477000	usd
CY2022Q4	us-gaap	Excess Of Replacement Or Current Costs Over Stated Lifo Value ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue	9249000	usd
CY2023	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	3575000	usd
CY2022	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	2180000	usd
CY2021	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	0	usd
CY2023	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	-228000	usd
CY2023	us-gaap	Inventory Lifo Reserve Effect On Income Net InventoryLIFOReserveEffectOnIncomeNet	186000	usd
CY2023	npk	Inventory Lifo Reserve Effect On Earnings Per Share InventoryLifoReserveEffectOnEarningsPerShare	0.03
CY2022	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	4925000	usd
CY2022	us-gaap	Inventory Lifo Reserve Effect On Income Net InventoryLIFOReserveEffectOnIncomeNet	-3925000	usd
CY2022	npk	Inventory Lifo Reserve Effect On Earnings Per Share InventoryLifoReserveEffectOnEarningsPerShare	-0.55
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
CY2023Q4	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	160793000	usd
CY2022Q4	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	119114000	usd
CY2023Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	2188000	usd
CY2023Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	144684000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	13921000	usd
CY2022Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	3255000	usd
CY2022Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	105564000	usd
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	10324000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	13666000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	8167000	usd
CY2023Q4	us-gaap	Loss Contingency Accrual Product Liability Gross LossContingencyAccrualProductLiabilityGross	5065000	usd
CY2023Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	330000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	900000	usd
CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2441000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	7631000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	5660000	usd
CY2022Q4	us-gaap	Loss Contingency Accrual Product Liability Gross LossContingencyAccrualProductLiabilityGross	5407000	usd
CY2022Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	309000	usd
CY2022Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	921000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1640000	usd
CY2023Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	497012
CY2023	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	569
CY2022	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	510
CY2021	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	292
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	512000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	476000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	469000	usd
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	1132000	usd
CY2023Q4	npk	Share Based Compensation Arrangement Number Of Plan Participants ShareBasedCompensationArrangementNumberOfPlanParticipants	40	pure
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	3.1
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	9314000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7389000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6675000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-252000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	167000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1742000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9062000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7556000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8417000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1509000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2157000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-819000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	319000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-154000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-793000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1190000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2311000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1612000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7872000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5245000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6805000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	969000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.001	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.023	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.018	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.021	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.02	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.006	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0.012	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0.001	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Fdii Percent EffectiveIncomeTaxRateReconciliationFdiiPercent	0.003	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Fdii Percent EffectiveIncomeTaxRateReconciliationFdiiPercent	0.002	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Fdii Percent EffectiveIncomeTaxRateReconciliationFdiiPercent	0.002	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.001	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.001	pure
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002	pure
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004	pure
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001	pure
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.186	pure
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.202	pure
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.21	pure
CY2023Q4	npk	Deferred Tax Assets Capitalized Research And Development DeferredTaxAssetsCapitalizedResearchAndDevelopment	3215000	usd
CY2022Q4	npk	Deferred Tax Assets Capitalized Research And Development DeferredTaxAssetsCapitalizedResearchAndDevelopment	1284000	usd
CY2023Q4	npk	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsStateAndLocal	1534000	usd
CY2022Q4	npk	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsStateAndLocal	2336000	usd
CY2023Q4	npk	Deferred Tax Assets Insurance DeferredTaxAssetsInsurance	1128000	usd
CY2022Q4	npk	Deferred Tax Assets Insurance DeferredTaxAssetsInsurance	1142000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1654000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1457000	usd
CY2023Q4	npk	Number Of Entity Employees Union Members NumberOfEntityEmployeesUnionMembers	191	pure
CY2022Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	1095000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences	904000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences	908000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	140000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1933000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	9544000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	10155000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	954000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1960000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	8590000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	8195000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	1921000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	2157000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	860000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	532000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	6000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	0	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2787000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2689000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5803000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5506000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	954000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1960000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2458000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2375000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	544000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	628000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	70000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	32000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	530000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	577000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	61000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	-0	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2481000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2458000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	166000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	169000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	169000	usd
CY2023	us-gaap	Income Tax Examination Year Under Examination IncomeTaxExaminationYearUnderExamination	2022
CY2023	us-gaap	Lease Cost LeaseCost	1421000	usd
CY2022	us-gaap	Lease Cost LeaseCost	1248000	usd
CY2021	us-gaap	Lease Cost LeaseCost	1190000	usd
CY2023Q4	npk	Percentage Of Entity Employees Union Members PercentageOfEntityEmployeesUnionMembers	0.19	pure
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	900000	usd
CY2022Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	921000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due Within One Year AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear	190000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Second Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInSecondYear	129000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Third Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInThirdYear	118000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fourth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFourthYear	107000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due In Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueInFifthYear	96000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due After Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear	260000	usd
CY2023Q4	us-gaap	Accrual For Environmental Loss Contingencies Gross AccrualForEnvironmentalLossContingenciesGross	900000	usd
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	pure
CY2022	npk	Government Contract Number Of Contractors GovernmentContractNumberOfContractors	2	pure
CY2023	us-gaap	Revenues Revenues	340912000	usd
CY2023	us-gaap	Gross Profit GrossProfit	67452000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	35033000	usd
CY2023Q4	us-gaap	Assets Assets	440536000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6007000	usd
CY2023	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1840000	usd
CY2022	us-gaap	Revenues Revenues	321623000	usd
CY2022	us-gaap	Gross Profit GrossProfit	55125000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	22127000	usd
CY2022Q4	us-gaap	Assets Assets	411847000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2979000	usd
CY2022	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1030000	usd
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
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	1215000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	1079000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	938000	usd
CY2023	npk	Shortterm And Variable Lease Cost ShorttermAndVariableLeaseCost	206000	usd
CY2022	npk	Shortterm And Variable Lease Cost ShorttermAndVariableLeaseCost	169000	usd
CY2021	npk	Shortterm And Variable Lease Cost ShorttermAndVariableLeaseCost	252000	usd
CY2023	us-gaap	Operating Lease Expense OperatingLeaseExpense	1348000	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	1129000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	1076000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	1421000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	1248000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	1190000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P19Y6M
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.048	pure
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1005000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	879000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	807000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	808000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	814000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	13009000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	17322000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	6658000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10664000	usd
CY2023	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	2281000	usd
CY2022	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	2195000	usd
CY2021	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	1971000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	2186000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	2186000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	2186000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	2186000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	2186000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	6558000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	17488000	usd
CY2023Q1	us-gaap	Revenues Revenues	80409000	usd
CY2023Q1	us-gaap	Gross Profit GrossProfit	18020000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	8878000	usd
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.25
CY2023Q2	us-gaap	Revenues Revenues	78946000	usd
CY2023Q2	us-gaap	Gross Profit GrossProfit	13380000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	5503000	usd
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2023Q3	us-gaap	Revenues Revenues	83141000	usd
CY2023Q3	us-gaap	Gross Profit GrossProfit	15399000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	7019000	usd
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.99
CY2023Q4	us-gaap	Revenues Revenues	98416000	usd
CY2023Q4	us-gaap	Gross Profit GrossProfit	20653000	usd
CY2023Q4	us-gaap	Net Income Loss NetIncomeLoss	13159000	usd
CY2023Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.85
CY2023	us-gaap	Revenues Revenues	340912000	usd
CY2023	us-gaap	Gross Profit GrossProfit	67452000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	34559000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.86
CY2022Q1	us-gaap	Revenues Revenues	60754000	usd
CY2022Q1	us-gaap	Gross Profit GrossProfit	9711000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	2915000	usd
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
CY2022Q2	us-gaap	Revenues Revenues	77138000	usd
CY2022Q2	us-gaap	Gross Profit GrossProfit	15038000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	6684000	usd
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2022Q3	us-gaap	Revenues Revenues	69683000	usd
CY2022Q3	us-gaap	Gross Profit GrossProfit	17062000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	8927000	usd
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.26
CY2022Q4	us-gaap	Revenues Revenues	114048000	usd
CY2022Q4	us-gaap	Gross Profit GrossProfit	13314000	usd
CY2022Q4	us-gaap	Net Income Loss NetIncomeLoss	2173000	usd
CY2022Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2022	us-gaap	Revenues Revenues	321623000	usd
CY2022	us-gaap	Gross Profit GrossProfit	55125000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	20699000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.92
CY2022Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables	2136000	usd
CY2022Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Inventory BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory	2309000	usd
CY2022Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	6058000	usd
CY2022Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Capital Lease Obligation BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation	2339000	usd
CY2021Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	7615000	usd

Files In Submission

Name	View Source	Status
0001437749-24-008099-index-headers.html	Edgar Link	pending
0001437749-24-008099-index.html	Edgar Link	pending
0001437749-24-008099.txt	Edgar Link	pending
0001437749-24-008099-xbrl.zip	Edgar Link	pending
ex_609004.htm	Edgar Link	pending
ex_609005.htm	Edgar Link	pending
ex_609007.htm	Edgar Link	pending
ex_609008.htm	Edgar Link	pending
ex_609009.htm	Edgar Link	pending
ex_609010.htm	Edgar Link	pending
ex_639179.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
npk-20231231.xsd	Edgar Link	pending
npk20231231_10k.htm	Edgar Link	pending
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
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R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
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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
npk-20231231_cal.xml	Edgar Link	unprocessable
npk-20231231_def.xml	Edgar Link	unprocessable
npk-20231231_lab.xml	Edgar Link	unprocessable
npk-20231231_pre.xml	Edgar Link	unprocessable
npk20231231_10k_htm.xml	Edgar Link	completed
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
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R70.htm	Edgar Link	pending
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R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable

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$NPK
NATIONAL PRESTO INDUSTRIES INC Stock $npk

2024 Q1 Form 10-K Financial Statement

#000143774924008099 Filed on March 15, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NPK NATIONAL PRESTO INDUSTRIES INC Stock $npk

2024 Q1 Form 10-K Financial Statement

#000143774924008099 Filed on March 15, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NPK
NATIONAL PRESTO INDUSTRIES INC Stock $npk