$NWPX
NORTHWEST PIPE CO Stock $nwpx

$nwpx Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000143774924006640 Filed on March 05, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$113.2M	$110.2M	$444.4M
YoY Change	14.25%	3.12%	-2.91%
Cost Of Revenue	$93.08M	$90.87M	$366.7M
YoY Change	12.8%	6.96%	-1.37%
Gross Profit	$20.13M	$19.29M	$77.64M
YoY Change	21.46%	-11.8%	-9.57%
Gross Profit Margin	17.78%	17.51%	17.47%
Selling, General & Admin	$11.44M	$10.57M	$43.78M
YoY Change	-3.56%	-2.94%	6.7%
% of Gross Profit	56.84%	54.77%	56.39%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$4.413M	$4.015M	$15.81M
YoY Change	14.33%	-9.02%	-7.58%
% of Gross Profit	21.92%	20.81%	20.36%
Operating Expenses	$11.44M	$10.57M	$43.78M
YoY Change	-3.56%	-2.94%	6.7%
Operating Profit	$8.690M	$8.725M	$33.86M
YoY Change	84.46%	-20.58%	-24.46%
Interest Expense	-$1.474M	-$1.133M	$4.855M
YoY Change	-207.67%	-3.57%	36.07%
% of Operating Profit	-16.96%	-12.99%	14.34%
Other Income/Expense, Net	$7.000K	$500.0K	$276.0K
YoY Change	-124.14%	1119.51%	184.54%
Pretax Income	$7.223M	$7.992M	$29.28M
YoY Change	118.02%	-18.88%	-29.19%
Income Tax	$1.985M	$2.548M	$8.207M
% Of Pretax Income	27.48%	31.88%	28.03%
Net Earnings	$5.238M	$5.444M	$21.07M
YoY Change	121.76%	-31.62%	-32.35%
Net Earnings / Revenue	4.63%	4.94%	4.74%
Basic Earnings Per Share	$0.53		$2.11
Diluted Earnings Per Share	$0.52	$0.54	$2.09
COMMON SHARES
Basic Shares Outstanding	9.892M	10.01M	9.991M
Diluted Shares Outstanding	10.05M		10.08M

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$4.262M	$4.068M	$4.068M
YoY Change	8.34%	10.51%	10.51%
Cash & Equivalents	$4.262M	$4.068M	$4.068M
Short-Term Investments
Other Short-Term Assets	$7.840M	$9.026M	$9.026M
YoY Change	-12.96%	-15.56%	-15.56%
Inventory	$96.48M	$91.23M	$91.23M
Prepaid Expenses
Receivables	$188.1M	$168.2M	$168.2M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$296.7M	$272.5M	$272.5M
YoY Change	13.75%	-2.24%	-2.24%
LONG-TERM ASSETS
Property, Plant & Equipment	$232.3M	$144.0M	$232.1M
YoY Change	72.82%	8.1%	2.57%
Goodwill	$55.50M	$55.50M
YoY Change	0.0%	-0.01%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$6.735M	$6.709M	$6.709M
YoY Change	16.7%	21.06%	21.06%
Total Long-Term Assets	$324.6M	$325.4M	$325.4M
YoY Change	0.95%	0.87%	0.87%
TOTAL ASSETS
Total Short-Term Assets	$296.7M	$272.5M	$272.5M
Total Long-Term Assets	$324.6M	$325.4M	$325.4M
Total Assets	$621.3M	$597.9M	$597.9M
YoY Change	6.68%	-0.58%	-0.58%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$26.37M	$31.14M	$31.14M
YoY Change	5.95%	15.48%	15.48%
Accrued Expenses	$27.56M	$27.91M	$31.13M
YoY Change	13.42%	-9.83%	-12.71%
Deferred Revenue	$18.60M	$21.45M
YoY Change	-27.91%	22.88%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$10.76M	$10.76M	$12.48M
YoY Change	0.0%	0.0%	16.0%
Total Short-Term Liabilities	$83.27M	$96.19M	$96.19M
YoY Change	-7.84%	5.9%	5.9%
LONG-TERM LIABILITIES
Long-Term Debt	$89.86M	$54.49M	$60.25M
YoY Change	43.51%	-34.9%	-28.02%
Other Long-Term Liabilities	$94.69M	$10.62M	$90.14M
YoY Change	1090.13%	38.66%	-7.2%
Total Long-Term Liabilities	$184.6M	$10.62M	$150.4M
YoY Change	2219.63%	38.66%	-16.83%
TOTAL LIABILITIES
Total Short-Term Liabilities	$83.27M	$96.19M	$96.19M
Total Long-Term Liabilities	$184.6M	$10.62M	$150.4M
Total Liabilities	$278.7M	$257.5M	$257.5M
YoY Change	6.65%	-9.02%	-9.02%
SHAREHOLDERS EQUITY
Retained Earnings	$217.4M	$212.1M
YoY Change	12.38%	11.03%
Common Stock	$126.2M	$129.2M
YoY Change	-1.88%	0.93%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$342.6M	$340.4M	$340.4M
YoY Change
Total Liabilities & Shareholders Equity	$621.3M	$597.9M	$597.9M
YoY Change	6.68%	-0.58%	-0.58%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$5.238M	$5.444M	$21.07M
YoY Change	121.76%	-31.62%	-32.35%
Depreciation, Depletion And Amortization	$4.413M	$4.015M	$15.81M
YoY Change	14.33%	-9.02%	-7.58%
Cash From Operating Activities	-$26.09M	$9.046M	$53.46M
YoY Change	-199.27%	-213.4%	204.76%
INVESTING ACTIVITIES
Capital Expenditures	$4.570M	$5.047M	$18.29M
YoY Change	4.29%	-55.59%	-19.88%
Acquisitions			$0.00
YoY Change
Other Investing Activities	$48.00K	$587.0K	-$219.0K
YoY Change		48.98%	106.6%
Cash From Investing Activities	-$4.522M	-$4.460M	-$20.37M
YoY Change	3.19%	-59.34%	-11.62%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$707.0K
YoY Change
Debt Paid & Issued, Net			$0.00
YoY Change
Cash From Financing Activities	30.81M	-4.576M	-$32.70M
YoY Change	-242.31%	-124.18%	-627.87%
NET CHANGE
Cash From Operating Activities	-26.09M	9.046M	$53.46M
Cash From Investing Activities	-4.522M	-4.460M	-$20.37M
Cash From Financing Activities	30.81M	-4.576M	-$32.70M
Net Change In Cash	194.0K	10.00K	$387.0K
YoY Change	-23.32%	-140.0%	-43.42%
FREE CASH FLOW
Cash From Operating Activities	-$26.09M	$9.046M	$53.46M
Capital Expenditures	$4.570M	$5.047M	$18.29M
Free Cash Flow	-$30.66M	$3.999M	$35.16M
YoY Change	-240.0%	-120.68%	-764.85%

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	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	121000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	369000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	15000000
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	15000000
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	9985580
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	9985580
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	9927360
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	9927360
CY2023	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	145000	usd
CY2022	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	23000	usd
CY2021	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	79000	usd
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2022	nwpx	Number Of Customers With Receivable Balance In Excess Of Ten Percent Of Receivables NumberOfCustomersWithReceivableBalanceInExcessOfTenPercentOfReceivables	1	pure
CY2022Q4	us-gaap	Goodwill Goodwill	55500000	usd
CY2021Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	0	usd
CY2023	nwpx	Number Of Inactive Stock Incentive Plans NumberOfInactiveStockIncentivePlans	1	pure
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2023	us-gaap	Open Tax Year OpenTaxYear	2019 2020 2021 2022 2023
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	0-27140
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	OR
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	93-0557988
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	201 NE Park Plaza Drive, Suite 100
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Vancouver
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98684
CY2023	dei	City Area Code CityAreaCode	360
CY2023	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2023	dei	Trading Symbol TradingSymbol	NWPX
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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	262653481	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	9892244
CY2023	dei	Auditor Firm AuditorFirmId	659
CY2023	dei	Auditor Name AuditorName	Moss Adams LLP
CY2023	dei	Auditor Location AuditorLocation	Portland, Oregon
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	444355000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	457665000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	333313000	usd
CY2023	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	366713000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	371810000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	289059000	usd
CY2023	us-gaap	Gross Profit GrossProfit	77642000	usd
CY2022	us-gaap	Gross Profit GrossProfit	85855000	usd
CY2021	us-gaap	Gross Profit GrossProfit	44254000	usd
CY2023	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	43784000	usd
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	41034000	usd
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	28222000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	33858000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	44821000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	16032000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	276000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	97000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	328000	usd
CY2023	us-gaap	Interest Expense InterestExpense	4855000	usd
CY2022	us-gaap	Interest Expense InterestExpense	3568000	usd
CY2021	us-gaap	Interest Expense InterestExpense	1202000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	29279000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	41350000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	15158000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8207000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10201000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3635000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	21072000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	31149000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	11523000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.11
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.14
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.17
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.09
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.11
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.16
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9991000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9914000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9854000
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10081000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10012000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9928000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	21072000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	31149000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	11523000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-171000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	893000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	184000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	20901000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	32042000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	11707000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4068000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3681000	usd
CY2023Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	47645000	usd
CY2022Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	71563000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	120516000	usd
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CY2022Q4	us-gaap	Inventory Net InventoryNet	71029000	usd
CY2023Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	9026000	usd
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	10689000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	272484000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	278740000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	143955000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	133166000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	88155000	usd
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CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	31074000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	35264000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6709000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5542000	usd
CY2023Q4	us-gaap	Assets Assets	597881000	usd
CY2022Q4	us-gaap	Assets Assets	601340000	usd
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	10756000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	10756000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	31142000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	26968000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	27913000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	30957000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	21450000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	17456000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4933000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4702000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	96194000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	90839000	usd
CY2023Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	54485000	usd
CY2022Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	83696000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	85283000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	89472000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	10942000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	11402000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10617000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	7657000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	257521000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	283066000	usd
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	100000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	99000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	129095000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	127911000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	212125000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	191053000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-960000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-789000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	340360000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	318274000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	597881000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	601340000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	269626000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	11523000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1166000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3216000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	283383000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	31149000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	853000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3702000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	318274000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	21072000	usd
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1652000	usd
CY2023	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	835000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3672000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	340360000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	21072000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	31149000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	11523000	usd
CY2023	nwpx	Depreciation And Finance Lease Right Of Use Asset Amortization DepreciationAndFinanceLeaseRightOfUseAssetAmortization	11616000	usd
CY2022	nwpx	Depreciation And Finance Lease Right Of Use Asset Amortization DepreciationAndFinanceLeaseRightOfUseAssetAmortization	12664000	usd
CY2021	nwpx	Depreciation And Finance Lease Right Of Use Asset Amortization DepreciationAndFinanceLeaseRightOfUseAssetAmortization	11482000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4190000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4439000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2142000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-172000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	514000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	180000	usd
CY2023	nwpx	Gain On Insurance Proceeds GainOnInsuranceProceeds	466000	usd
CY2022	nwpx	Gain On Insurance Proceeds GainOnInsuranceProceeds	-0	usd
CY2021	nwpx	Gain On Insurance Proceeds GainOnInsuranceProceeds	-0	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	3672000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	3702000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	3216000	usd
CY2023	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1547000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	286000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-193000	usd
CY2023	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-23775000	usd
CY2022	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	19346000	usd
CY2021	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-392000	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-5256000	usd
CY2022	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-225000	usd
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	33752000	usd
CY2023	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	20200000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	11378000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	17650000	usd
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-5241000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-3381000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-6727000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4704000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-5826000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	16783000	usd
CY2023	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-6780000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-1698000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-7047000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	53455000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	17540000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-5811000	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	-0	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	87215000	usd
CY2023	nwpx	Payment Of Working Capital Adjustment In Business Acquisition PaymentOfWorkingCapitalAdjustmentInBusinessAcquisition	2731000	usd
CY2022	nwpx	Payment Of Working Capital Adjustment In Business Acquisition PaymentOfWorkingCapitalAdjustmentInBusinessAcquisition	-0	usd
CY2021	nwpx	Payment Of Working Capital Adjustment In Business Acquisition PaymentOfWorkingCapitalAdjustmentInBusinessAcquisition	-0	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18291000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	22829000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13262000	usd
CY2023	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	-0	usd
CY2022	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	327000	usd
CY2021	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	-0	usd
CY2023	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	431000	usd
CY2022	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	usd
CY2021	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	0	usd
CY2023	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-219000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-106000	usd
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-325000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-20372000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-23050000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-100152000	usd
CY2023	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	155398000	usd
CY2022	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	177634000	usd
CY2021	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	122272000	usd
CY2023	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	184609000	usd
CY2022	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	180699000	usd
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	35511000	usd
CY2023	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	10756000	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2023	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	-0	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	-0	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	13762000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	826000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	597000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	415000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1652000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	853000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1166000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	707000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	-0	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	-0	usd
CY2023	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-300000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-47000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-385000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32696000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	6194000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	71033000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	387000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	684000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-34930000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3681000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2997000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	37927000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	4068000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3681000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2997000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	4660000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	3170000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	339000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	5911000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13774000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2481000	usd
CY2023	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	656000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1314000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	788000	usd
CY2023	nwpx	Accrued Payments For Repurchase Of Common Stock AccruedPaymentsForRepurchaseOfCommonStock	128000	usd
CY2022	nwpx	Accrued Payments For Repurchase Of Common Stock AccruedPaymentsForRepurchaseOfCommonStock	0	usd
CY2021	nwpx	Accrued Payments For Repurchase Of Common Stock AccruedPaymentsForRepurchaseOfCommonStock	0	usd
CY2023	nwpx	Noncash Or Part Noncash Acquisition Value Of Consideration Accrued NoncashOrPartNoncashAcquisitionValueOfConsiderationAccrued	0	usd
CY2022	nwpx	Noncash Or Part Noncash Acquisition Value Of Consideration Accrued NoncashOrPartNoncashAcquisitionValueOfConsiderationAccrued	1820000	usd
CY2021	nwpx	Noncash Or Part Noncash Acquisition Value Of Consideration Accrued NoncashOrPartNoncashAcquisitionValueOfConsiderationAccrued	911000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	952000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	568000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	16043000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	5270000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1466000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	853000	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	pure
CY2023	nwpx	Number Of Manufacturing Facilities NumberOfManufacturingFacilities	13	pure
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;"><b>Use of Estimates</b></p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt;">The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and judgments that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. On an ongoing basis, the Company evaluates all of its estimates, including those related to business combinations, allowance for doubtful accounts, inventories, property and equipment (including depreciation and valuation), goodwill, intangible assets (including amortization), revenue recognition, share-based compensation, income taxes, and litigation and other contingencies. Actual results <em style="font: inherit;"> may </em>differ from these estimates under different assumptions or conditions.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2023Q4	nwpx	Book Overdrafts BookOverdrafts	1800000	usd
CY2022Q4	nwpx	Book Overdrafts BookOverdrafts	600000	usd
CY2023Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	2200000	usd
CY2022Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	1600000	usd
CY2023Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	5200000	usd
CY2022Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	8000000	usd
CY2023Q4	us-gaap	Sales And Excise Tax Payable Current SalesAndExciseTaxPayableCurrent	5300000	usd
CY2022Q4	us-gaap	Sales And Excise Tax Payable Current SalesAndExciseTaxPayableCurrent	4400000	usd
CY2023	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	400000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	500000	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-500000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	21072000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	31149000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	11523000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9991000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9914000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9854000
CY2023	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	90000
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	98000
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	74000
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10081000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10012000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9928000
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.11
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.14
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.17
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.09
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.11
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.16
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;"><b>Concentrations of Credit Risk</b></p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt;">Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of trade receivables, foreign currency forward contracts, interest rate swaps, and deferred compensation plan assets. Trade receivables generally represent a large number of customers, including municipalities, manufacturers, distributors, and contractors, dispersed across a wide geographic base. As of <em style="font: inherit;"> December </em><em style="font: inherit;">31,</em> <em style="font: inherit;">2023</em> and <em style="font: inherit;">2022</em>, one customer had a balance in excess of <em style="font: inherit;">10%</em> of total accounts receivable. Foreign currency forward contracts and interest rate swaps are with a high-quality financial institution. The Company’s deferred compensation plan assets, included in Other assets, are invested in a diversified portfolio of stock and bond mutual funds.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2023	nwpx	Number Of Customers With Receivable Balance In Excess Of Ten Percent Of Receivables NumberOfCustomersWithReceivableBalanceInExcessOfTenPercentOfReceivables	1	pure
CY2023Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	68110000	usd
CY2022Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	47978000	usd
CY2023Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	8912000	usd
CY2022Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	5114000	usd
CY2023Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	11911000	usd
CY2022Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	15773000	usd
CY2023Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	2296000	usd
CY2022Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	2164000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	91229000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	71029000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	246079000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	232372000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	126359000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	117856000	usd
CY2023Q4	nwpx	Property Plant And Equipment Net Excluding Construction In Progress PropertyPlantAndEquipmentNetExcludingConstructionInProgress	119720000	usd
CY2022Q4	nwpx	Property Plant And Equipment Net Excluding Construction In Progress PropertyPlantAndEquipmentNetExcludingConstructionInProgress	114516000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	143955000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	133166000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	55500000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	42283000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11209000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	31074000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	43990000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	8726000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	35264000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	4033000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	4033000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	4033000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	4033000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4033000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	10909000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	31074000	usd
CY2023	nwpx	Interest Expense Debt And Finance Leases Net Of Amounts Capitalized InterestExpenseDebtAndFinanceLeasesNetOfAmountsCapitalized	4900000	usd
CY2023	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	500000	usd
CY2022	nwpx	Interest Expense Debt And Finance Leases Net Of Amounts Capitalized InterestExpenseDebtAndFinanceLeasesNetOfAmountsCapitalized	3600000	usd
CY2021	nwpx	Interest Expense Debt And Finance Leases Net Of Amounts Capitalized InterestExpenseDebtAndFinanceLeasesNetOfAmountsCapitalized	1200000	usd
CY2021	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	100000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	2212000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	88155000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	93124000	usd
CY2023Q4	nwpx	Lease Right Of Use Asset LeaseRightOfUseAsset	95247000	usd
CY2022Q4	nwpx	Lease Right Of Use Asset LeaseRightOfUseAsset	95742000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	90216000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	94174000	usd
CY2023Q4	nwpx	Lease Liability LeaseLiability	97697000	usd
CY2022Q4	nwpx	Lease Liability LeaseLiability	97211000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	1400000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	1200000	usd
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	795000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	577000	usd
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	413000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	266000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	148000	usd
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	90000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	7765000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	7770000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	4627000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1402000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1000000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	993000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	313000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	251000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	158000	usd
CY2023	us-gaap	Lease Cost LeaseCost	10541000	usd
CY2022	us-gaap	Lease Cost LeaseCost	9746000	usd
CY2021	us-gaap	Lease Cost LeaseCost	6281000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6874000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1923000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	6913000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1847000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	6583000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1614000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	6192000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1147000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	6308000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	76453000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	8743000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	109323000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	1262000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	19107000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	90216000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4933000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	85283000	usd
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y10M24D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y6M7D
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P16Y8M23D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P17Y9M29D
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0693	pure
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0544	pure
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0217	pure
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0219	pure
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	266000	usd
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	148000	usd
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	90000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	6930000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	6818000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	4142000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	826000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	597000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	415000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	5270000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1466000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	853000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	952000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	568000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	16043000	usd
CY2023Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	4280000	usd
CY2022Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	5177000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	300000	usd
CY2022Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	30000000	usd
CY2023Q4	nwpx	Rule10b51 Trading Plan Designated Amount Rule10b51TradingPlanDesignatedAmount	10000000	usd
CY2023Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	29200000	usd
CY2022Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	0	usd
CY2023	nwpx	Retirement Plan Expense RetirementPlanExpense	2500000	usd
CY2022	nwpx	Retirement Plan Expense RetirementPlanExpense	2200000	usd
CY2021	nwpx	Retirement Plan Expense RetirementPlanExpense	1800000	usd
CY2023	nwpx	Number Of Active Stock Incentive Plans NumberOfActiveStockIncentivePlans	1	pure
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3672000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3702000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3216000	usd
CY2023Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	722573
CY2023Q4	nwpx	Common Stock Capital Shares Reserved For Future Issuance Percentage Vesting Of Outstanding Ps As Assumed CommonStockCapitalSharesReservedForFutureIssuancePercentageVestingOfOutstandingPSAsAssumed	1	pure
CY2022Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	121778000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	120516000	usd
CY2023Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1100000	usd
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	444355000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	457665000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	333313000	usd
CY2023	nwpx	Increase Decrease In Revenue From Contract With Customers Including Assessed Tax IncreaseDecreaseInRevenueFromContractWithCustomersIncludingAssessedTax	-1100000	usd
CY2022	nwpx	Increase Decrease In Revenue From Contract With Customers Including Assessed Tax IncreaseDecreaseInRevenueFromContractWithCustomersIncludingAssessedTax	-600000	usd
CY2021	nwpx	Increase Decrease In Revenue From Contract With Customers Including Assessed Tax IncreaseDecreaseInRevenueFromContractWithCustomersIncludingAssessedTax	2000000	usd
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	444355000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	457665000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	333313000	usd
CY2022Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	121778000	usd
CY2021Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	107170000	usd
CY2023	nwpx	Contract With Customer Asset Revenue Recognized In Advance Of Billings ContractWithCustomerAssetRevenueRecognizedInAdvanceOfBillings	291812000	usd
CY2022	nwpx	Contract With Customer Asset Revenue Recognized In Advance Of Billings ContractWithCustomerAssetRevenueRecognizedInAdvanceOfBillings	306095000	usd
CY2023	nwpx	Contract With Customer Asset Billings ContractWithCustomerAssetBillings	-293356000	usd
CY2022	nwpx	Contract With Customer Asset Billings ContractWithCustomerAssetBillings	-294506000	usd
CY2023	nwpx	Contract With Customer Asset Other ContractWithCustomerAssetOther	282000	usd
CY2022	nwpx	Contract With Customer Asset Other ContractWithCustomerAssetOther	3019000	usd
CY2022Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	17456000	usd
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	2623000	usd
CY2023	nwpx	Contract With Customer Liability Billings ContractWithCustomerLiabilityBillings	20815000	usd
CY2022	nwpx	Contract With Customer Liability Billings ContractWithCustomerLiabilityBillings	17618000	usd
CY2023	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	-16984000	usd
CY2022	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	-2663000	usd
CY2023	nwpx	Contract With Customer Liability Other ContractWithCustomerLiabilityOther	163000	usd
CY2022	nwpx	Contract With Customer Liability Other ContractWithCustomerLiabilityOther	-122000	usd
CY2023Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	21450000	usd
CY2022Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	17456000	usd
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	273000000	usd
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.76	pure
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.23	pure
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	27814000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	40271000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	14000000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1465000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1079000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1158000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	29279000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	41350000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	15158000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6817000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8443000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2256000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1519000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1264000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1064000	usd
CY2023	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	289000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	198000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	213000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8625000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9905000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3533000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-612000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-22000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	573000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	195000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	340000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-464000	usd
CY2023	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-22000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-7000	usd
CY2023	nwpx	Deferred Federal State And Local And Foreign Income Tax Expense Benefit DeferredFederalStateAndLocalAndForeignIncomeTaxExpenseBenefit	-418000	usd
CY2022	nwpx	Deferred Federal State And Local And Foreign Income Tax Expense Benefit DeferredFederalStateAndLocalAndForeignIncomeTaxExpenseBenefit	296000	usd
CY2021	nwpx	Deferred Federal State And Local And Foreign Income Tax Expense Benefit DeferredFederalStateAndLocalAndForeignIncomeTaxExpenseBenefit	102000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8207000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10201000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3635000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6148000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8683000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3183000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	942000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1463000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	547000	usd
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-30000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-247000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	257000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-35000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-31000	usd
CY2023	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	133000	usd
CY2022	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	97000	usd
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	104000	usd
CY2023	nwpx	Effective Income Tax Rate Reconciliation Accrued Interest On Uncertain Income Tax Positions Amount EffectiveIncomeTaxRateReconciliationAccruedInterestOnUncertainIncomeTaxPositionsAmount	264000	usd
CY2022	nwpx	Effective Income Tax Rate Reconciliation Accrued Interest On Uncertain Income Tax Positions Amount EffectiveIncomeTaxRateReconciliationAccruedInterestOnUncertainIncomeTaxPositionsAmount	106000	usd
CY2021	nwpx	Effective Income Tax Rate Reconciliation Accrued Interest On Uncertain Income Tax Positions Amount EffectiveIncomeTaxRateReconciliationAccruedInterestOnUncertainIncomeTaxPositionsAmount	16000	usd
CY2023	nwpx	Effective Income Tax Reconciliation State Franchise Tax Amount EffectiveIncomeTaxReconciliationStateFranchiseTaxAmount	250000	usd
CY2022	nwpx	Effective Income Tax Reconciliation State Franchise Tax Amount EffectiveIncomeTaxReconciliationStateFranchiseTaxAmount	110000	usd
CY2021	nwpx	Effective Income Tax Reconciliation State Franchise Tax Amount EffectiveIncomeTaxReconciliationStateFranchiseTaxAmount	92000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	243000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-222000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-29000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8207000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10201000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3635000	usd
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.28	pure
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.247	pure
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.24	pure
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	3096000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	3840000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	380000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	350000	usd
CY2023Q4	nwpx	Deferred Tax Asset Trade Receivable Net DeferredTaxAssetTradeReceivableNet	532000	usd
CY2022Q4	nwpx	Deferred Tax Asset Trade Receivable Net DeferredTaxAssetTradeReceivableNet	329000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	3429000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2944000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	2777000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	2863000	usd
CY2023Q4	nwpx	Deferred Tax Asset Contract Assets Net DeferredTaxAssetContractAssetsNet	934000	usd
CY2022Q4	nwpx	Deferred Tax Asset Contract Assets Net DeferredTaxAssetContractAssetsNet	403000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1952000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1074000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	13100000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	11803000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	6641000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	6051000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	6459000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5752000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	13850000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	13550000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	800000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1319000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	1164000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	606000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1217000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1285000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	17031000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	16760000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	10572000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	11008000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	10942000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	11402000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	10572000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	11008000	usd
CY2023Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	300000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4472000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4366000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4350000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	264000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	106000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	16000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4736000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4472000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4366000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	400000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	100000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-960000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-789000	usd
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	444355000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	457665000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	333313000	usd
CY2023	us-gaap	Gross Profit GrossProfit	77642000	usd
CY2022	us-gaap	Gross Profit GrossProfit	85855000	usd
CY2021	us-gaap	Gross Profit GrossProfit	44254000	usd
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	15806000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	17103000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13624000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18291000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	22829000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13262000	usd
CY2023Q4	us-gaap	Assets Assets	597881000	usd
CY2022Q4	us-gaap	Assets Assets	601340000	usd

Files In Submission

Name	View Source	Status
0001437749-24-006640-index-headers.html	Edgar Link	pending
0001437749-24-006640-index.html	Edgar Link	pending
0001437749-24-006640.txt	Edgar Link	pending
0001437749-24-006640-xbrl.zip	Edgar Link	pending
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ex_608626.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nwpx-20231231.xsd	Edgar Link	pending
nwpx20231231c_10k.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
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nwpx-20231231_def.xml	Edgar Link	unprocessable
nwpx-20231231_lab.xml	Edgar Link	unprocessable
nwpx-20231231_pre.xml	Edgar Link	unprocessable
nwpx20231231c_10k_htm.xml	Edgar Link	completed
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable

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$NWPX
NORTHWEST PIPE CO Stock $nwpx

2024 Q1 Form 10-K Financial Statement

#000143774924006640 Filed on March 05, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWPX NORTHWEST PIPE CO Stock $nwpx

2024 Q1 Form 10-K Financial Statement

#000143774924006640 Filed on March 05, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NWPX
NORTHWEST PIPE CO Stock $nwpx