$WLDN
Willdan Group, Inc. Stock $wldn

$wldn Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000155837024002758 Filed on March 08, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$122.5M	$155.7M	$510.1M
YoY Change	19.38%	37.46%	18.87%
Cost Of Revenue	$75.07M	$101.3M	$330.3M
YoY Change	22.42%	44.34%	15.68%
Gross Profit	$47.42M	$54.43M	$179.8M
YoY Change	14.87%	26.26%	25.2%
Gross Profit Margin	38.71%	34.96%	35.24%
Selling, General & Admin	$30.34M	$30.57M	$110.4M
YoY Change	15.83%	19.12%	11.04%
% of Gross Profit	63.99%	56.18%	61.44%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.592M	$3.911M	$16.43M
YoY Change	-14.48%	-7.95%	-6.05%
% of Gross Profit	7.58%	7.19%	9.14%
Operating Expenses	$42.06M	$42.68M	$157.7M
YoY Change	12.85%	10.82%	4.68%
Operating Profit	$5.361M	$11.75M	$22.07M
YoY Change	33.56%	155.52%	-412.53%
Interest Expense	-$2.137M	-$2.303M	-$9.413M
YoY Change	-13.34%	9.04%	76.67%
% of Operating Profit	-39.86%	-19.6%	-42.64%
Other Income/Expense, Net	-$1.433M	$538.0K	-$7.483M
YoY Change	-38.39%	-264.53%	70.49%
Pretax Income	$3.928M	$9.984M	$14.59M
YoY Change	132.7%	362.44%	-227.41%
Income Tax	$1.000M	$1.953M	$3.665M
% Of Pretax Income	25.46%	19.56%	25.12%
Net Earnings	$2.942M	$8.031M	$10.93M
YoY Change	215.67%	-1989.65%	-229.33%
Net Earnings / Revenue	2.4%	5.16%	2.14%
Basic Earnings Per Share	$0.22	$0.59	$0.82
Diluted Earnings Per Share	$0.21	$0.58	$0.80
COMMON SHARES
Basic Shares Outstanding	13.77M	13.65M	13.39M
Diluted Shares Outstanding	13.91M	13.73M	13.61M

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$46.93M	$23.40M	$23.40M
YoY Change	162.84%	165.69%	165.69%
Cash & Equivalents	$46.93M	$23.40M	$23.40M
Short-Term Investments
Other Short-Term Assets	$5.863M	$3.888M	$3.888M
YoY Change	7.95%	-77.31%	-77.31%
Inventory
Prepaid Expenses
Receivables	$50.79M	$69.68M	$163.6M
Other Receivables	$552.0K	$1.169M	$1.169M
Total Short-Term Assets	$186.5M	$192.0M	$192.0M
YoY Change	20.18%	10.37%	10.37%
LONG-TERM ASSETS
Property, Plant & Equipment	$40.34M	$39.56M	$39.56M
YoY Change	8.32%	13.27%	13.27%
Goodwill	$131.1M	$131.1M
YoY Change	0.78%	0.78%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$4.832M	$4.949M	$20.91M
YoY Change	-65.86%	-53.4%	-28.3%
Total Long-Term Assets	$221.4M	$223.6M	$223.6M
YoY Change	-7.05%	-5.15%	-5.15%
TOTAL ASSETS
Total Short-Term Assets	$186.5M	$192.0M	$192.0M
Total Long-Term Assets	$221.4M	$223.6M	$223.6M
Total Assets	$407.9M	$415.6M	$415.6M
YoY Change	3.69%	1.44%	1.44%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$34.52M	$33.19M	$33.19M
YoY Change	17.76%	15.12%	15.12%
Accrued Expenses	$38.41M	$54.13M	$58.67M
YoY Change	-5.27%	-8.43%	-7.95%
Deferred Revenue	$16.43M	$13.18M
YoY Change	5.8%	4.75%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$8.924M	$8.452M	$9.638M
YoY Change	-45.7%	-50.0%	-46.5%
Total Short-Term Liabilities	$104.1M	$114.7M	$114.7M
YoY Change	-6.55%	-9.82%	-9.82%
LONG-TERM LIABILITIES
Long-Term Debt	$86.57M	$88.98M	$90.16M
YoY Change	1.42%	-1.73%	-2.15%
Other Long-Term Liabilities	$686.0K	$1.142M	$10.90M
YoY Change	164.86%	340.93%	23.05%
Total Long-Term Liabilities	$87.26M	$90.12M	$101.1M
YoY Change	1.91%	-0.75%	0.06%
TOTAL LIABILITIES
Total Short-Term Liabilities	$104.1M	$114.7M	$114.7M
Total Long-Term Liabilities	$87.26M	$90.12M	$101.1M
Total Liabilities	$202.4M	$215.7M	$215.7M
YoY Change	-2.76%	-5.45%	-5.45%
SHAREHOLDERS EQUITY
Retained Earnings	$17.52M	$14.58M
YoY Change	282.26%	299.26%
Common Stock	$188.2M	$185.9M
YoY Change	4.19%	4.54%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$205.5M	$199.8M	$199.8M
YoY Change
Total Liabilities & Shareholders Equity	$407.9M	$415.6M	$415.6M
YoY Change	3.69%	1.44%	1.44%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$2.942M	$8.031M	$10.93M
YoY Change	215.67%	-1989.65%	-229.33%
Depreciation, Depletion And Amortization	$3.592M	$3.911M	$16.43M
YoY Change	-14.48%	-7.95%	-6.05%
Cash From Operating Activities	$26.95M	$15.10M	$39.21M
YoY Change	55.85%	206.37%	315.71%
INVESTING ACTIVITIES
Capital Expenditures	$1.971M	$2.345M	$9.925M
YoY Change	-43.49%	-10.94%	3.36%
Acquisitions			$1.600M
YoY Change
Other Investing Activities	$19.00K	-$2.000K	-$1.532M
YoY Change	46.15%		-2142.67%
Cash From Investing Activities	-$1.952M	-$2.337M	-$11.46M
YoY Change	-43.83%	-11.24%	20.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.469M	-2.245M	-23.85M
YoY Change	-90.49%	-126.82%	-385.3%
NET CHANGE
Cash From Operating Activities	26.95M	15.10M	39.21M
Cash From Investing Activities	-1.952M	-2.337M	-11.46M
Cash From Financing Activities	-1.469M	-2.245M	-23.85M
Net Change In Cash	23.53M	10.52M	3.912M
YoY Change	-1541.67%	-1.36%	-52.66%
FREE CASH FLOW
Cash From Operating Activities	$26.95M	$15.10M	$39.21M
Capital Expenditures	$1.971M	$2.345M	$9.925M
Free Cash Flow	$24.98M	$12.76M	$29.29M
YoY Change	80.95%	455.46%	-17430.77%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2022Q4	us-gaap	Restricted Cash Asset Statement Of Financial Position Extensible List RestrictedCashAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#RestrictedCashCurrent
CY2023Q4	us-gaap	Restricted Cash Asset Statement Of Financial Position Extensible List RestrictedCashAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#RestrictedCashCurrent
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001370450
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023Q4	us-gaap	Derivative Asset Current Statement Of Financial Position Extensible Enumeration DerivativeAssetCurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#PrepaidExpenseAndOtherAssetsCurrent
CY2023Q4	us-gaap	Derivative Liability Noncurrent Statement Of Financial Position Extensible Enumeration DerivativeLiabilityNoncurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2021Q4	us-gaap	Restricted Cash Asset Statement Of Financial Position Extensible List RestrictedCashAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#RestrictedCashCurrent
CY2023Q4	us-gaap	Derivative Asset Current Statement Of Financial Position Extensible Enumeration DerivativeAssetCurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#PrepaidExpenseAndOtherAssetsCurrent
CY2023Q4	us-gaap	Derivative Liability Noncurrent Statement Of Financial Position Extensible Enumeration DerivativeLiabilityNoncurrentStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2023	dei	Document Type DocumentType	10-K
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-29
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-29
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-33076
CY2023	dei	Entity Registrant Name EntityRegistrantName	WILLDAN GROUP, INC.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	14-1951112
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	2401 East Katella Avenue
CY2023	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 300
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Anaheim
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92806
CY2023	dei	City Area Code CityAreaCode	800
CY2023	dei	Local Phone Number LocalPhoneNumber	424-9144
CY2023	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2023	dei	Entity Listing Par Value Per Share EntityListingParValuePerShare	0.01
CY2023	dei	Trading Symbol TradingSymbol	WLDN
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	173700000
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	13770106
CY2023	dei	Auditor Firm AuditorFirmId	173
CY2023	dei	Auditor Name AuditorName	Crowe LLP
CY2023	dei	Auditor Location AuditorLocation	Los Angeles, California
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	23397000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8806000
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	10679000
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	866000
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	640000
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	69677000
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	60202000
CY2023Q4	wldn	Contract With Customer Asset And Construction Contractor Receivable Retainage After Allowance For Credit Loss Current ContractWithCustomerAssetAndConstructionContractorReceivableRetainageAfterAllowanceForCreditLossCurrent	93885000
CY2022Q4	wldn	Contract With Customer Asset And Construction Contractor Receivable Retainage After Allowance For Credit Loss Current ContractWithCustomerAssetAndConstructionContractorReceivableRetainageAfterAllowanceForCreditLossCurrent	83060000
CY2023Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	1169000
CY2022Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	4773000
CY2023Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	3888000
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	6454000
CY2023Q4	us-gaap	Assets Current AssetsCurrent	192016000
CY2022Q4	us-gaap	Assets Current AssetsCurrent	173974000
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	27097000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	22537000
CY2023Q4	us-gaap	Goodwill Goodwill	131144000
CY2022Q4	us-gaap	Goodwill Goodwill	130124000
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12465000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12390000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	31956000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	41486000
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4949000
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	10620000
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	15961000
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	18543000
CY2023Q4	us-gaap	Assets Assets	415588000
CY2022Q4	us-gaap	Assets Assets	409674000
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	33193000
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	28833000
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	54129000
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	59110000
CY2022Q4	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	4000000
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	13183000
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	12585000
CY2023Q4	us-gaap	Notes Payable Current NotesPayableCurrent	8452000
CY2022Q4	us-gaap	Notes Payable Current NotesPayableCurrent	16903000
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1186000
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1113000
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4537000
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4625000
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	114680000
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	127169000
CY2023Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	88979000
CY2022Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	90544000
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1184000
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1601000
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9758000
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8599000
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1142000
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	259000
CY2023Q4	us-gaap	Liabilities Liabilities	215743000
CY2022Q4	us-gaap	Liabilities Liabilities	228172000
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	40000000
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	13682000
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	13682000
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	13296000
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	13296000
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	137000
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	133000
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	185795000
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	177718000
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-664000
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	14577000
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3651000
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	199845000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	181502000
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	415588000
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	409674000
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	510095000
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	429138000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	353755000
CY2023	us-gaap	Cost Direct Labor CostDirectLabor	89915000
CY2022	us-gaap	Cost Direct Labor CostDirectLabor	82972000
CY2021	us-gaap	Cost Direct Labor CostDirectLabor	65648000
CY2023	wldn	Cost Of Subcontractor Services And Other Direct Costs CostOfSubcontractorServicesAndOtherDirectCosts	240413000
CY2022	wldn	Cost Of Subcontractor Services And Other Direct Costs CostOfSubcontractorServicesAndOtherDirectCosts	202587000
CY2021	wldn	Cost Of Subcontractor Services And Other Direct Costs CostOfSubcontractorServicesAndOtherDirectCosts	152233000
CY2023	us-gaap	Cost Of Revenue CostOfRevenue	330328000
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-8410000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-7967000
CY2022	us-gaap	Cost Of Revenue CostOfRevenue	285559000
CY2021	us-gaap	Cost Of Revenue CostOfRevenue	217881000
CY2023	us-gaap	Gross Profit GrossProfit	179767000
CY2022	us-gaap	Gross Profit GrossProfit	143579000
CY2021	us-gaap	Gross Profit GrossProfit	135874000
CY2023	wldn	Labor And Related Expense Excluding Stock Based Compensation LaborAndRelatedExpenseExcludingStockBasedCompensation	95556000
CY2022	wldn	Labor And Related Expense Excluding Stock Based Compensation LaborAndRelatedExpenseExcludingStockBasedCompensation	81801000
CY2021	wldn	Labor And Related Expense Excluding Stock Based Compensation LaborAndRelatedExpenseExcludingStockBasedCompensation	73812000
CY2023	us-gaap	Occupancy Net OccupancyNet	9565000
CY2022	us-gaap	Occupancy Net OccupancyNet	9287000
CY2021	us-gaap	Occupancy Net OccupancyNet	9896000
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	5323000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8373000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	16563000
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	16431000
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	17489000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	17146000
CY2023	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	30818000
CY2022	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	33692000
CY2021	us-gaap	Other Selling General And Administrative Expense OtherSellingGeneralAndAdministrativeExpense	27148000
CY2023	us-gaap	Operating Expenses OperatingExpenses	157693000
CY2022	us-gaap	Operating Expenses OperatingExpenses	150642000
CY2021	us-gaap	Operating Expenses OperatingExpenses	144565000
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	22074000
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	-7063000
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-8691000
CY2023	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-9413000
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-5328000
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-3869000
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1930000
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	939000
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	156000
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-7483000
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-4389000
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3713000
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	14591000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-11452000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-12404000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3665000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3004000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3987000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	10926000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-8448000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-8417000
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-664000
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	38000
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	450000
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	10262000
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2021	wldn	Provision For Doubtful Accounts Cash Flow Impact ProvisionForDoubtfulAccountsCashFlowImpact	102000
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	5323000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8373000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.65
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.68
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.65
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.68
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13394000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13013000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12458000
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13606000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13013000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12458000
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	169164000
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2655000
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1924000
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3117000
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	-1000
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	16563000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-8417000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	450000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	179221000
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	3036000
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	274000
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	992000
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8373000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-8448000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	38000
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	181502000
CY2023	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2781000
CY2023	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	182000
CY2023	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	205000
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5323000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	10926000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-664000
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	199845000
CY2023	us-gaap	Profit Loss ProfitLoss	10926000
CY2022	us-gaap	Profit Loss ProfitLoss	-8448000
CY2021	us-gaap	Profit Loss ProfitLoss	-8417000
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16431000
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17489000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17146000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2582000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1694000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2738000
CY2023	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	63000
CY2022	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	64000
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	24000
CY2023	wldn	Provision For Doubtful Accounts Cash Flow Impact ProvisionForDoubtfulAccountsCashFlowImpact	825000
CY2022	wldn	Provision For Doubtful Accounts Cash Flow Impact ProvisionForDoubtfulAccountsCashFlowImpact	243000
CY2023	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	1631000
CY2022	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	1920000
CY2021	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	1909000
CY2023	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1114000
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	177000
CY2022	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	1718000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	16563000
CY2022	wldn	Accretion And Fair Value Adjustments Contingent Consideration AccretionAndFairValueAdjustmentsContingentConsideration	3168000
CY2021	wldn	Accretion And Fair Value Adjustments Contingent Consideration AccretionAndFairValueAdjustmentsContingentConsideration	2333000
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	10300000
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-6766000
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	14209000
CY2023	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	10825000
CY2022	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	23772000
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-3138000
CY2023	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-3604000
CY2022	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-1494000
CY2021	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-138000
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-3170000
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1230000
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-828000
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-5671000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3223000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7849000
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4360000
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-7839000
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-4700000
CY2023	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	5917000
CY2022	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	12970000
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1625000
CY2023	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	598000
CY2022	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-914000
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	6065000
CY2023	wldn	Increase Decrease In Right Of Use Assets IncreaseDecreaseInRightOfUseAssets	-995000
CY2022	wldn	Increase Decrease In Right Of Use Assets IncreaseDecreaseInRightOfUseAssets	332000
CY2021	wldn	Increase Decrease In Right Of Use Assets IncreaseDecreaseInRightOfUseAssets	197000
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	39214000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9433000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9804000
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9925000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9602000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8500000
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	68000
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	75000
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	46000
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1600000
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-11457000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-9527000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8454000
CY2023	wldn	Business Acquisition Contingent Consideration Cash Payment BusinessAcquisitionContingentConsiderationCashPayment	4000000
CY2022	wldn	Business Acquisition Contingent Consideration Cash Payment BusinessAcquisitionContingentConsiderationCashPayment	10206000
CY2021	wldn	Business Acquisition Contingent Consideration Cash Payment BusinessAcquisitionContingentConsiderationCashPayment	6615000
CY2022	wldn	Proceeds From Cash Deposits To Be Held In Trust For Energy Incentive Rebate Payments Restricted Cash Financing Activities ProceedsFromCashDepositsToBeHeldInTrustForEnergyIncentiveRebatePaymentsRestrictedCashFinancingActivities	10679000
CY2023	wldn	Payments For Cash Deposits Held In Trust For Energy Incentive Rebate Payments Restricted Cash Financing Activities PaymentsForCashDepositsHeldInTrustForEnergyIncentiveRebatePaymentsRestrictedCashFinancingActivities	10679000
CY2021	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	2074000
CY2023	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	105000000
CY2022	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	20000000
CY2023	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	112875000
CY2022	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	13000000
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	13000000
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1304000
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1054000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	545000
CY2023	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	182000
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	274000
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1924000
CY2023	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	2781000
CY2022	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	3036000
CY2021	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	2655000
CY2023	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	205000
CY2022	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	992000
CY2021	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	3117000
CY2021	wldn	Payments For Proceeds From Restricted Stock Award And Units Financing Activities PaymentsForProceedsFromRestrictedStockAwardAndUnitsFinancingActivities	1000
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-23845000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	8358000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-18534000
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	3912000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	8264000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-17184000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	19485000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11221000
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	28405000
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	23397000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	19485000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11221000
CY2023	us-gaap	Interest Paid Net InterestPaidNet	10193000
CY2022	us-gaap	Interest Paid Net InterestPaidNet	5066000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	3545000
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-3072000
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1120000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1616000
CY2023	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	961000
CY2022	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	2451000
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	1376000
CY2023	us-gaap	Fiscal Period FiscalPeriod	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;padding-left:36pt;text-indent:-36pt;margin:0pt 0pt 12pt 18pt;"><i style="font-style:italic;">Fiscal Years</i></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 12pt 0pt;">The Company operates and reports its annual financial results based on 52 or 53-week periods ending on the Friday closest to December 31. The Company operates and reports its quarterly financial results based on the 13-week period ending on the Friday closest to June 30, September 30, and December 31 and the 13 or 14-week period ending on the Friday closest to March 31, as applicable. Fiscal year 2023, fiscal year 2022, and fiscal year 2021, which ended on December 29, 2023, December 30, 2022, and December 31, 2021, respectively, were all comprised of 52 weeks, with all quarters presented consisting of 13 weeks. </p>
CY2021Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2021Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2021Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023Q2	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2021	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P364D
CY2022	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P364D
CY2023	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P364D
CY2021Q2	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2021Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2021Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2021Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q2	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023Q1	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023Q2	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2023	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:11pt;padding-left:36pt;text-indent:-36pt;margin:0pt 0pt 10pt 18pt;"><i style="font-style:italic;">Reclassifications</i></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:11.25pt 0pt 12pt 0pt;">Certain prior year amounts have been reclassified in the consolidated financial statements to conform to the current year presentation.</p>
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:11pt;padding-left:36pt;text-indent:-36pt;margin:0pt 0pt 10pt 18pt;"><i style="font-style:italic;">Use of Estimates</i></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;line-height:11pt;text-indent:36pt;margin:0pt 0pt 10pt 0pt;">The preparation of consolidated financial statements in conformity with generally accepted accounting principles in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements. Estimates also affect the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.</p>
CY2023Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	70543000
CY2022Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	60842000
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	866000
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	640000
CY2023Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	69677000
CY2022Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	60202000
CY2023	wldn	Number Of Variable Interest Entity NumberOfVariableInterestEntity	1
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2023Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	14300000
CY2022Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	8500000
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1200000
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	23397000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8806000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11221000
CY2022Q4	us-gaap	Restricted Cash RestrictedCash	10679000
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	23397000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	19485000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	11221000
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	640000
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1115000
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2127000
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	826000
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	243000
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	102000
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	600000
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	718000
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	1224000
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	110000
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	866000
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	640000
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1115000
CY2023Q4	us-gaap	Contract With Customer Asset Gross Current ContractWithCustomerAssetGrossCurrent	79585000
CY2022Q4	us-gaap	Contract With Customer Asset Gross Current ContractWithCustomerAssetGrossCurrent	74545000
CY2023Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	14300000
CY2022Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	8515000
CY2023Q4	wldn	Contract With Customer Asset And Construction Contractor Receivable Retainage After Allowance For Credit Loss Current ContractWithCustomerAssetAndConstructionContractorReceivableRetainageAfterAllowanceForCreditLossCurrent	93885000
CY2022Q4	wldn	Contract With Customer Asset And Construction Contractor Receivable Retainage After Allowance For Credit Loss Current ContractWithCustomerAssetAndConstructionContractorReceivableRetainageAfterAllowanceForCreditLossCurrent	83060000
CY2023Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	2849000
CY2022Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	2330000
CY2023Q4	wldn	Accounts Receivable Contract With Customer Asset Construction Contractor Receivable Retainage After Allowance For Credit Loss AccountsReceivableContractWithCustomerAssetConstructionContractorReceivableRetainageAfterAllowanceForCreditLoss	96734000
CY2022Q4	wldn	Accounts Receivable Contract With Customer Asset Construction Contractor Receivable Retainage After Allowance For Credit Loss AccountsReceivableContractWithCustomerAssetConstructionContractorReceivableRetainageAfterAllowanceForCreditLoss	85390000
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	6139000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5503000
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	61867000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	51431000
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	34770000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	28894000
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	27097000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	22537000
CY2023	us-gaap	Depreciation Depreciation	6300000
CY2022	us-gaap	Depreciation Depreciation	6300000
CY2021	us-gaap	Depreciation Depreciation	5600000
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1300000
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1100000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	600000
CY2023Q4	wldn	Accrued Subcontractor Costs AccruedSubcontractorCosts	30196000
CY2022Q4	wldn	Accrued Subcontractor Costs AccruedSubcontractorCosts	28374000
CY2023Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	14423000
CY2022Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	8470000
CY2023Q4	wldn	Employee Withholdings EmployeeWithholdings	3123000
CY2022Q4	wldn	Employee Withholdings EmployeeWithholdings	2571000
CY2023Q4	wldn	Compensation And Payroll Taxes Current CompensationAndPayrollTaxesCurrent	3125000
CY2022Q4	wldn	Compensation And Payroll Taxes Current CompensationAndPayrollTaxesCurrent	2340000
CY2023Q4	wldn	Accrued Rebates And Other Current AccruedRebatesAndOtherCurrent	139000
CY2022Q4	wldn	Accrued Rebates And Other Current AccruedRebatesAndOtherCurrent	14643000
CY2023Q4	wldn	Accrued Accounting And Taxes Current AccruedAccountingAndTaxesCurrent	3123000
CY2022Q4	wldn	Accrued Accounting And Taxes Current AccruedAccountingAndTaxesCurrent	2712000
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	54129000
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	59110000
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-800000
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0
CY2023	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimated Net Amount To Be Transferred DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred	100000
CY2023	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimate Of Time To Transfer1 DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimateOfTimeToTransfer1	P12M
CY2023Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	46000
CY2023Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	887000
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	-800000
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	1020000
CY2023	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	0
CY2023Q4	us-gaap	Goodwill Goodwill	131144000
CY2021Q4	us-gaap	Goodwill Goodwill	130124000
CY2022	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0
CY2022	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	0
CY2022Q4	us-gaap	Goodwill Goodwill	130124000
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	98452000
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	107958000
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1021000
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	511000
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	97431000
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	107447000
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	8452000
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	16903000
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	88979000
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	90544000
CY2023Q4	wldn	Long Term Debt Gross Fiscal Year Maturity Year One LongTermDebtGrossFiscalYearMaturityYearOne	8452000
CY2023Q4	wldn	Long Term Debt Gross Fiscal Year Maturity Year Two LongTermDebtGrossFiscalYearMaturityYearTwo	10000000
CY2023Q4	wldn	Long Term Debt Gross Fiscal Year Maturity Year Three LongTermDebtGrossFiscalYearMaturityYearThree	80000000
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	98452000
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1021000
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	97431000
CY2022Q4	us-gaap	Goodwill Goodwill	130124000
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	99814000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	67858000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	99234000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	57748000
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10100000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11200000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11500000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	7081000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	6284000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	5561000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5541000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4930000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2559000
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	31956000
CY2023	us-gaap	Lease Practical Expedients Package LeasePracticalExpedientsPackage	true
CY2023	us-gaap	Lease Practical Expedient Use Of Hindsight LeasePracticalExpedientUseOfHindsight	false
CY2023	us-gaap	Lessee Operating Lease Existence Of Option To Extend LesseeOperatingLeaseExistenceOfOptionToExtend	true
CY2023	us-gaap	Lessee Operating Lease Existence Of Option To Terminate LesseeOperatingLeaseExistenceOfOptionToTerminate	true
CY2023Q4	us-gaap	Residual Value Of Leased Asset ResidualValueOfLeasedAsset	0
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	6114000
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	6140000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	6497000
CY2023	us-gaap	Sublease Income SubleaseIncome	49000
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1331000
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1118000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	577000
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	105000
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	76000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	34000
CY2023	us-gaap	Lease Cost LeaseCost	7501000
CY2022	us-gaap	Lease Cost LeaseCost	7334000
CY2021	us-gaap	Lease Cost LeaseCost	7108000
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12465000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12390000
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4537000
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4625000
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9758000
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8599000
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	14295000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	13224000
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	6139000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5503000
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	3837000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2830000
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2302000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2673000
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1186000
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1113000
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1184000
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1601000
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2370000
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2714000
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y5M4D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y4M6D
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y3M21D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y7M28D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0609
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0425
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0519
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0347
CY2023	wldn	Operating Lease Rent Expenses OperatingLeaseRentExpenses	6800000
CY2022	wldn	Operating Lease Rent Expenses OperatingLeaseRentExpenses	6500000
CY2021	wldn	Operating Lease Rent Expenses OperatingLeaseRentExpenses	6800000
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	5843000
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	6471000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	6727000
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	105000
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	76000
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	34000
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1304000
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1054000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	545000
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5374000
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2745000
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	783000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	5207000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1321000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4312000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	712000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3619000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	379000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1709000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	103000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1010000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	9000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	115000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	15972000
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2524000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1677000
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	154000
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	14295000
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2370000
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4537000
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1186000
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9758000
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1184000
CY2023	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	2200000
CY2022	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	2300000
CY2021	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	2000000.0
CY2023	wldn	Variable Interest Entity Percentage Of Costs Reimbursed VariableInterestEntityPercentageOfCostsReimbursed	0.10
CY2023	wldn	Number Of Variable Interest Entity NumberOfVariableInterestEntity	1
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	510095000
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	16431000
CY2023	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-9413000
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	14591000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3665000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	10926000
CY2023Q4	us-gaap	Assets Assets	415588000
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	429138000
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	17489000
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-5328000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-11452000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3004000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-8448000
CY2022Q4	us-gaap	Assets Assets	409674000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	353755000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	17146000
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-3869000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-12404000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3987000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-8417000
CY2021Q4	us-gaap	Assets Assets	394422000
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	510095000
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	510095000
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	429138000
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	429138000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	353755000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	353755000
CY2023Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	22
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5300000
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8400000
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16600000
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	0
CY2022Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	0
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	0
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	3700000
CY2023Q4	us-gaap	Share Price SharePrice	21.50
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	816000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.38
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y8M4D
CY2023	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	19000
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	9.77
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	10000
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	19.05
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	787000
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.64
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y8M12D
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	787000
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	20.64
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P2Y8M12D
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	787000
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	20.64
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P2Y8M12D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	849000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	19.89
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y8M4D
CY2022	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	33000
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8.12
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	816000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.38
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y8M4D
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	816000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	20.38
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P3Y8M4D
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	816000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	20.38
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P3Y8M4D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1003000
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.86
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y5M4D
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	150000
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.86
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	4000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	24.33
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	849000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	19.89
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y8M4D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	849000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	19.89
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P4Y8M4D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	849000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	19.89
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P4Y8M4D
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	0
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	0
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	0
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	0
CY2023Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	0
CY2023Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	0
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	0
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	0
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	0
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	0
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	52000
CY2021Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	31.73
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	52000
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	31.73
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	0
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	0
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	61000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1224000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1606000
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	676000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-73000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	530000
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2022000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1519000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2656000
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	906000
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-188000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-255000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3665000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3004000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3987000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3064000
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-2405000
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-2605000
CY2023	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Not Separately Disclosed Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseNotSeparatelyDisclosedAmount	194000
CY2022	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Not Separately Disclosed Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseNotSeparatelyDisclosedAmount	24000
CY2021	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Not Separately Disclosed Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseNotSeparatelyDisclosedAmount	18000
CY2023	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	121000
CY2022	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	711000
CY2021	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	1349000
CY2023	wldn	Income Tax Reconciliation Nondeductible Expense Incentive Stock Options IncomeTaxReconciliationNondeductibleExpenseIncentiveStockOptions	560000
CY2022	wldn	Income Tax Reconciliation Nondeductible Expense Incentive Stock Options IncomeTaxReconciliationNondeductibleExpenseIncentiveStockOptions	576000
CY2021	wldn	Income Tax Reconciliation Nondeductible Expense Incentive Stock Options IncomeTaxReconciliationNondeductibleExpenseIncentiveStockOptions	-1276000
CY2023	wldn	Income Tax Reconciliation Nondeductible Expense Energy Efficient Commercial Building Deduction IncomeTaxReconciliationNondeductibleExpenseEnergyEfficientCommercialBuildingDeduction	-717000
CY2022	wldn	Income Tax Reconciliation Nondeductible Expense Energy Efficient Commercial Building Deduction IncomeTaxReconciliationNondeductibleExpenseEnergyEfficientCommercialBuildingDeduction	-1378000
CY2021	wldn	Income Tax Reconciliation Nondeductible Expense Energy Efficient Commercial Building Deduction IncomeTaxReconciliationNondeductibleExpenseEnergyEfficientCommercialBuildingDeduction	-558000
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1250000
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-111000
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-660000
CY2023	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	867000
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	517000
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	761000
CY2021	wldn	Income Tax Expense Benefit Net Operating Loss Cares Act IncomeTaxExpenseBenefitNetOperatingLossCaresAct	-579000
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1105000
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	60000
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	96000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-20000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3665000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3004000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3987000
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2907000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1374000
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	15890000
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	23089000
CY2023Q4	wldn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	3977000
CY2022Q4	wldn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	3592000
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1214000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1404000
CY2023Q4	wldn	Deferred Tax Assets Capitalized Research And Development DeferredTaxAssetsCapitalizedResearchAndDevelopment	4286000
CY2022Q4	wldn	Deferred Tax Assets Capitalized Research And Development DeferredTaxAssetsCapitalizedResearchAndDevelopment	2078000
CY2023Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	2819000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1754000
CY2023Q4	wldn	Deferred Tax Assets Excess Business Interest Limitation DeferredTaxAssetsExcessBusinessInterestLimitation	84000
CY2022Q4	wldn	Deferred Tax Assets Excess Business Interest Limitation DeferredTaxAssetsExcessBusinessInterestLimitation	1437000
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	432000
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	207000
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	31609000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	34935000
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1191000
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1191000
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	30418000
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	33744000
CY2023Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	2960000
CY2022Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	4223000
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3013000
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2778000
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	4926000
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	4794000
CY2023Q4	wldn	Deferred Tax Liabilities Lease Right Of Use Asset DeferredTaxLiabilitiesLeaseRightOfUseAsset	3558000
CY2022Q4	wldn	Deferred Tax Liabilities Lease Right Of Use Asset DeferredTaxLiabilitiesLeaseRightOfUseAsset	3406000
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	14457000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	15201000
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	15961000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	18543000
CY2022	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	0
CY2023	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	0
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2023	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10926000
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	10926000
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-8448000
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-8448000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-8417000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-8417000
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13394000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13013000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12458000
CY2023	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	212000
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13606000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13013000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12458000
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.65
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.68
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.65
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.68
CY2023Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	102603000
CY2023Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	119077000
CY2023Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	132738000
CY2023Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	155677000
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	4014000
CY2023Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	2474000
CY2023Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	3837000
CY2023Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	11749000
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	756000
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	243000
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	713000
CY2023Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1953000
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	932000
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	397000
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	1566000
CY2023Q4	us-gaap	Net Income Loss NetIncomeLoss	8031000
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.03
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.12
CY2023Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.07
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.03
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2023Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13266000
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13344000
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13462000
CY2023Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13503000
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13470000
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13487000
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13709000
CY2023Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13731000
CY2022Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	91838000
CY2022Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	102645000
CY2022Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	121399000
CY2022Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	113256000
CY2022Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-5608000
CY2022Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-5298000
CY2022Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-755000
CY2022Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	4598000
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2389000
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1673000
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1526000
CY2022Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2584000
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	-3773000
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	-4326000
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	76000
CY2022Q4	us-gaap	Net Income Loss NetIncomeLoss	-425000
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.30
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.33
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2022Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.03
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.30
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.33
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2022Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.03
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12786000
CY2022Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13016000
CY2022Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13110000
CY2022Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13138000
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12786000
CY2022Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13016000
CY2022Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13360000
CY2022Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13138000
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
0001558370-24-002758-index-headers.html	Edgar Link	pending
0001558370-24-002758-index.html	Edgar Link	pending
0001558370-24-002758.txt	Edgar Link	pending
0001558370-24-002758-xbrl.zip	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
wldn-20231229.xsd	Edgar Link	pending
wldn-20231229x10k.htm	Edgar Link	pending
wldn-20231229x10k001.jpg	Edgar Link	pending
wldn-20231229x10k004.jpg	Edgar Link	pending
wldn-20231229x10k005.jpg	Edgar Link	pending
wldn-20231229x10k006.jpg	Edgar Link	pending
wldn-20231229x10k007.jpg	Edgar Link	pending
wldn-20231229x10k008.jpg	Edgar Link	pending
wldn-20231229x10k009.jpg	Edgar Link	pending
wldn-20231229x10k010.jpg	Edgar Link	pending
wldn-20231229x10k011.jpg	Edgar Link	pending
wldn-20231229x10k012.jpg	Edgar Link	pending
wldn-20231229x10k013.jpg	Edgar Link	pending
wldn-20231229x10k014.jpg	Edgar Link	pending
wldn-20231229x10k015.jpg	Edgar Link	pending
wldn-20231229x10k016.gif	Edgar Link	pending
wldn-20231229x10k022.jpg	Edgar Link	pending
wldn-20231229x10k023.jpg	Edgar Link	pending
wldn-20231229x10k030.jpg	Edgar Link	pending
wldn-20231229xex10d18.htm	Edgar Link	pending
wldn-20231229xex10d18002.jpg	Edgar Link	pending
wldn-20231229xex10d19.htm	Edgar Link	pending
wldn-20231229xex10d19002.jpg	Edgar Link	pending
wldn-20231229xex21d1.htm	Edgar Link	pending
wldn-20231229xex23d1.htm	Edgar Link	pending
wldn-20231229xex31d1.htm	Edgar Link	pending
wldn-20231229xex31d2.htm	Edgar Link	pending
wldn-20231229xex32d1.htm	Edgar Link	pending
wldn-20231229xex4d2.htm	Edgar Link	pending
wldn-20231229xex97.htm	Edgar Link	pending
wldn-20231229_def.xml	Edgar Link	unprocessable
wldn-20231229_lab.xml	Edgar Link	unprocessable
wldn-20231229x10k_htm.xml	Edgar Link	completed
wldn-20231229_cal.xml	Edgar Link	unprocessable
wldn-20231229_pre.xml	Edgar Link	unprocessable

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$WLDN
Willdan Group, Inc. Stock $wldn

2024 Q1 Form 10-K Financial Statement

#000155837024002758 Filed on March 08, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLDN Willdan Group, Inc. Stock $wldn

2024 Q1 Form 10-K Financial Statement

#000155837024002758 Filed on March 08, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLDN
Willdan Group, Inc. Stock $wldn