$WLDN
Willdan Group, Inc. Stock $wldn

$wldn Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000155837023003367 Filed on March 10, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$102.6M	$113.3M	$429.1M
YoY Change		22.81%	9.76%
Cost Of Revenue	$61.32M	$70.15M	$285.6M
YoY Change		16.58%	9.16%
Gross Profit	$41.28M	$43.11M	$143.6M
YoY Change		34.51%	10.96%
Gross Profit Margin	40.23%	38.06%	33.46%
Selling, General & Admin	$26.20M	$25.67M	$99.46M
YoY Change		-1.03%	-0.81%
% of Gross Profit	63.46%	59.54%	69.27%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$4.200M	$4.249M	$17.49M
YoY Change		-0.42%	-6.69%
% of Gross Profit	10.17%	9.86%	12.18%
Operating Expenses	$37.27M	$38.51M	$150.6M
YoY Change		4.97%	3.45%
Operating Profit	$4.014M	$4.598M	-$7.063M
YoY Change		307.99%	-56.47%
Interest Expense	-$2.466M	-$2.112M	-$5.328M
YoY Change		-325.4%	-205.13%
% of Operating Profit	-61.43%	-45.93%
Other Income/Expense, Net	-$2.326M	-$327.0K	-$4.389M
YoY Change		-61.03%	27.51%
Pretax Income	$1.688M	$2.159M	-$11.45M
YoY Change		257.45%	-41.78%
Income Tax	$800.0K	$2.584M	-$3.004M
% Of Pretax Income	47.39%	119.69%
Net Earnings	$932.0K	-$425.0K	-$8.448M
YoY Change		-150.6%	-41.72%
Net Earnings / Revenue	0.91%	-0.38%	-1.97%
Basic Earnings Per Share	$0.07	-$0.03	-$0.65
Diluted Earnings Per Share	$0.07	-$0.03	-$0.65
COMMON SHARES
Basic Shares Outstanding	13.39M	13.29M	13.01M
Diluted Shares Outstanding	13.47M	13.14M	13.01M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$17.85M	$8.806M	$8.806M
YoY Change		83.27%	-21.52%
Cash & Equivalents	$17.85M	$8.806M	$8.806M
Short-Term Investments
Other Short-Term Assets	$5.431M	$17.13M	$17.13M
YoY Change		358.59%	244.59%
Inventory
Prepaid Expenses
Receivables	$51.92M	$60.20M	$143.3M
Other Receivables	$4.782M	$4.773M	$4.773M
Total Short-Term Assets	$155.2M	$174.0M	$174.0M
YoY Change		16.79%	16.79%
LONG-TERM ASSETS
Property, Plant & Equipment	$37.25M	$34.93M	$34.93M
YoY Change		108.43%	9.37%
Goodwill	$130.1M	$130.1M
YoY Change		0.0%
Intangibles		$41.49M
YoY Change		-21.3%
Long-Term Investments
YoY Change
Other Assets	$14.15M	$10.62M	$29.16M
YoY Change		-23.28%	-4.98%
Total Long-Term Assets	$238.1M	$235.7M	$235.7M
YoY Change		-3.98%	-3.98%
TOTAL ASSETS
Total Short-Term Assets	$155.2M	$174.0M	$174.0M
Total Long-Term Assets	$238.1M	$235.7M	$235.7M
Total Assets	$393.4M	$409.7M	$409.7M
YoY Change		3.87%	3.87%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$29.31M	$28.83M	$28.83M
YoY Change		-21.38%	-21.38%
Accrued Expenses	$40.55M	$59.11M	$63.74M
YoY Change		65.67%	54.49%
Deferred Revenue	$15.53M	$12.59M
YoY Change		-6.77%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$16.44M	$16.90M	$18.02M
YoY Change		12.42%	15.67%
Total Short-Term Liabilities	$111.4M	$127.2M	$127.2M
YoY Change		8.5%	8.5%
LONG-TERM LIABILITIES
Long-Term Debt	$85.36M	$90.54M	$92.15M
YoY Change		5.85%	6.75%
Other Long-Term Liabilities	$259.0K	$259.0K	$8.858M
YoY Change		232.05%	-24.15%
Total Long-Term Liabilities	$85.62M	$90.80M	$101.0M
YoY Change		6.06%	3.07%
TOTAL LIABILITIES
Total Short-Term Liabilities	$111.4M	$127.2M	$127.2M
Total Long-Term Liabilities	$85.62M	$90.80M	$101.0M
Total Liabilities	$208.1M	$228.2M	$228.2M
YoY Change		6.03%	6.03%
SHAREHOLDERS EQUITY
Retained Earnings	$4.583M	$3.651M
YoY Change		-69.82%
Common Stock	$180.7M	$177.9M
YoY Change		6.4%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$185.2M	$181.5M	$181.5M
YoY Change
Total Liabilities & Shareholders Equity	$393.4M	$409.7M	$409.7M
YoY Change		3.87%	3.87%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$932.0K	-$425.0K	-$8.448M
YoY Change		-150.6%	-41.72%
Depreciation, Depletion And Amortization	$4.200M	$4.249M	$17.49M
YoY Change		-0.42%	-6.69%
Cash From Operating Activities	$17.29M	$4.930M	$9.433M
YoY Change		-592.02%	-79.94%
INVESTING ACTIVITIES
Capital Expenditures	$3.488M	$2.633M	$9.602M
YoY Change		-246.44%	89.16%
Acquisitions
YoY Change
Other Investing Activities	$13.00K	$0.00	$75.00K
YoY Change		-100.0%	63.04%
Cash From Investing Activities	-$3.475M	-$2.633M	-$9.527M
YoY Change		46.69%	88.32%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-15.45M	8.370M	8.358M
YoY Change		-561.92%	-143.96%
NET CHANGE
Cash From Operating Activities	17.29M	4.930M	9.433M
Cash From Investing Activities	-3.475M	-2.633M	-9.527M
Cash From Financing Activities	-15.45M	8.370M	8.358M
Net Change In Cash	-1.632M	10.67M	8.264M
YoY Change		-331.44%	-64.0%
FREE CASH FLOW
Cash From Operating Activities	$17.29M	$4.930M	$9.433M
Capital Expenditures	$3.488M	$2.633M	$9.602M
Free Cash Flow	$13.80M	$2.297M	-$169.0K
YoY Change		188.57%	-100.4%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001370450
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2021Q4	us-gaap	Restricted Cash Asset Statement Of Financial Position Extensible List RestrictedCashAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#RestrictedCashCurrent
CY2022Q4	us-gaap	Restricted Cash Asset Statement Of Financial Position Extensible List RestrictedCashAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#RestrictedCashCurrent
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	60202000
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	67211000
CY2022Q4	wldn	Contract With Customer Asset And Construction Contractor Receivable Retainage After Allowance For Credit Loss Current ContractWithCustomerAssetAndConstructionContractorReceivableRetainageAfterAllowanceForCreditLossCurrent	83060000
CY2021Q4	wldn	Contract With Customer Asset And Construction Contractor Receivable Retainage After Allowance For Credit Loss Current ContractWithCustomerAssetAndConstructionContractorReceivableRetainageAfterAllowanceForCreditLossCurrent	59288000
CY2022Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	4773000
CY2022	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0
CY2022	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0
CY2022	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0
CY2021Q1	us-gaap	Restricted Cash Asset Statement Of Financial Position Extensible List RestrictedCashAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#RestrictedCashCurrent
CY2022	wldn	Proceeds From Sale Of Trade Accounts Receivable ProceedsFromSaleOfTradeAccountsReceivable	0
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2022	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	0
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-30
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-30
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-33076
CY2022	dei	Entity Registrant Name EntityRegistrantName	WILLDAN GROUP, INC.
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	14-1951112
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	2401 East Katella Avenue
CY2022	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 300
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Anaheim
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92806
CY2022	dei	City Area Code CityAreaCode	800
CY2022	dei	Local Phone Number LocalPhoneNumber	424-9144
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2022	dei	Entity Listing Par Value Per Share EntityListingParValuePerShare	0.01
CY2022	dei	Trading Symbol TradingSymbol	WLDN
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q3	dei	Entity Public Float EntityPublicFloat	288300000
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	13387200
CY2022	dei	Auditor Firm AuditorFirmId	173
CY2022	dei	Auditor Name AuditorName	Crowe LLP
CY2022	dei	Auditor Location AuditorLocation	Los Angeles, California
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 Current RestrictedCashCurrent	10679000
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	640000
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1115000
CY2021Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	6267000
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	6454000
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	4972000
CY2022Q4	us-gaap	Assets Current AssetsCurrent	173974000
CY2021Q4	us-gaap	Assets Current AssetsCurrent	148959000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	22537000
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	16757000
CY2022Q4	us-gaap	Goodwill Goodwill	130124000
CY2021Q4	us-gaap	Goodwill Goodwill	130124000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12390000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15177000
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	41486000
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	52713000
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	10620000
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	13843000
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	18543000
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	16849000
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CY2021Q4	us-gaap	Assets Assets	394422000
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CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	59110000
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	35680000
CY2022Q4	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	4000000
CY2021Q4	us-gaap	Business Combination Contingent Consideration Liability Current BusinessCombinationContingentConsiderationLiabilityCurrent	10206000
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	12585000
CY2021Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	13499000
CY2022Q4	us-gaap	Notes Payable Current NotesPayableCurrent	16903000
CY2021Q4	us-gaap	Notes Payable Current NotesPayableCurrent	15036000
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1113000
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	539000
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4625000
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	5575000
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	127169000
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	117207000
CY2021Q4	us-gaap	Business Combination Contingent Consideration Liability Noncurrent BusinessCombinationContingentConsiderationLiabilityNoncurrent	832000
CY2022Q4	us-gaap	Long Term Notes Payable LongTermNotesPayable	90544000
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CY2021Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
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CY2022Q4	us-gaap	Common Stock Value CommonStockValue	133000
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	128000
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CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1626000
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-4389000
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3713000
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3442000
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
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-19669000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3004000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3987000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5173000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-8448000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-8417000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-14496000
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
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-92000
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-8410000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-7967000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-14588000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.65
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.68
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.23
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.65
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.68
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.23
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13013000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12458000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	11793000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13013000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12458000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	11793000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	167278000
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2224000
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1082000
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2946000
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	16113000
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
CY2022	us-gaap	Profit Loss ProfitLoss	-8448000
CY2021	us-gaap	Profit Loss ProfitLoss	-8417000
CY2021	us-gaap	Profit Loss ProfitLoss	-14496000
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17489000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	17146000
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18743000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1694000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2738000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5209000
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
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	15000
CY2022	wldn	Provision For Doubtful Accounts Cash Flow Impact ProvisionForDoubtfulAccountsCashFlowImpact	243000
CY2021	wldn	Provision For Doubtful Accounts Cash Flow Impact ProvisionForDoubtfulAccountsCashFlowImpact	102000
CY2021	wldn	Provision For Doubtful Accounts Cash Flow Impact ProvisionForDoubtfulAccountsCashFlowImpact	1330000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	8373000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	16563000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	16113000
CY2022	wldn	Accretion And Fair Value Adjustments Contingent Consideration AccretionAndFairValueAdjustmentsContingentConsideration	3168000
CY2021	wldn	Accretion And Fair Value Adjustments Contingent Consideration AccretionAndFairValueAdjustmentsContingentConsideration	2333000
CY2021	wldn	Accretion And Fair Value Adjustments Contingent Consideration AccretionAndFairValueAdjustmentsContingentConsideration	7707000
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-6766000
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	14209000
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-3070000
CY2022	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	23772000
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-3138000
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-35498000
CY2022	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-1494000
CY2021	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-138000
CY2021	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	1192000
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
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-577000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3223000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7849000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-9955000
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-7839000
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-4700000
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7372000
CY2022	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	12970000
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1625000
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-34509000
CY2022	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-914000
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	6065000
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	1871000
CY2022	wldn	Increase Decrease In Right Of Use Assets IncreaseDecreaseInRightOfUseAssets	332000
CY2021	wldn	Increase Decrease In Right Of Use Assets IncreaseDecreaseInRightOfUseAssets	197000
CY2021	wldn	Increase Decrease In Right Of Use Assets IncreaseDecreaseInRightOfUseAssets	-210000
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
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	47025000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9602000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8500000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5076000
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
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	17000
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
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5059000
CY2022	wldn	Business Acquisition Contingent Consideration Cash Payment BusinessAcquisitionContingentConsiderationCashPayment	10206000
CY2021	wldn	Business Acquisition Contingent Consideration Cash Payment BusinessAcquisitionContingentConsiderationCashPayment	6615000
CY2021	wldn	Business Acquisition Contingent Consideration Cash Payment BusinessAcquisitionContingentConsiderationCashPayment	1433000
CY2022	wldn	Proceeds From Cash Deposits To Be Held In Trust For Energy Incentive Rebate Payments Restricted Cash Financing Activities ProceedsFromCashDepositsToBeHeldInTrustForEnergyIncentiveRebatePaymentsRestrictedCashFinancingActivities	10679000
CY2022	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	1920000
CY2021	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	1909000
CY2021	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	205000
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	177000
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	327000
CY2022	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	1718000
CY2021	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	2074000
CY2021	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	1140000
CY2022	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	20000000
CY2021	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	24000000
CY2022	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	13000000
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	13000000
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	42000000
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1054000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	545000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	549000
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	274000
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1924000
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1082000
CY2022	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	3036000
CY2021	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	2655000
CY2021	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	2224000
CY2022	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	992000
CY2021	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	3117000
CY2021	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	2946000
CY2021	wldn	Proceeds From Exercise Of Restricted Stock Awards And Units ProceedsFromExerciseOfRestrictedStockAwardsAndUnits	1000
CY2021	wldn	Proceeds From Exercise Of Restricted Stock Awards And Units ProceedsFromExerciseOfRestrictedStockAwardsAndUnits	-1000
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
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-19013000
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
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	22953000
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
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5452000
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
CY2022	us-gaap	Interest Paid Net InterestPaidNet	5066000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	3545000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	5031000
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1120000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1616000
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	174000
CY2021	wldn	Working Capital Adjustment Non Cash WorkingCapitalAdjustmentNonCash	1179000
CY2022	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	2451000
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	1376000
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	467000
CY2022	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 2022 and fiscal year 2021, which ended on December 30, 2022, and December 31, 2021, respectively, were both comprised of 52 weeks, with all quarters presented consisting of 13 weeks. Fiscal year 2020, which ended on January 1, 2021, was comprised of 53 weeks, with the first quarter consisting of 14 weeks and the remaining quarters consisting of 13 weeks each. </p>
CY2020Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2020Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2021Q1	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
CY2022Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2021	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P364D
CY2022	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
CY2021	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P371D
	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P98D
CY2020Q3	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2020Q4	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2021Q1	us-gaap	Fiscal Period Duration FiscalPeriodDuration	P91D
CY2022	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>
CY2022	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><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:18pt;margin:0pt 0pt 10pt 0pt;"><i style="font-style:italic;">Asset and Liability Valuation and Other Estimates Used in Preparation of Financial Statements</i></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 10pt 0pt;"><span style="display:inline-block;text-indent:0pt;width:36pt;"/>As of December 30, 2022, the Company did not have any impairment with respect to <span style="-sec-ix-hidden:Hidden_OnKVAg1VHEiG7N7yNDvWqQ;"><span style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;">goodwill</span></span> or <span style="-sec-ix-hidden:Hidden_W6U52nKuKU2krs_AvoLTuA;"><span style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;">long-lived assets</span></span>, including <span style="-sec-ix-hidden:Hidden_H6VsFBwPo0asm7TX3PHg9Q;"><span style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;">intangible</span></span> <span style="-sec-ix-hidden:Hidden_DRGLsSUB5k6LsFL444Q_iw;"><span style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;">assets</span></span>. Changes to the estimated future profitability of the business may require that the Company establish an additional valuation allowance against all or some portion of its net deferred tax assets.</p>
CY2021	wldn	Proceeds From Sale Of Trade Accounts Receivable ProceedsFromSaleOfTradeAccountsReceivable	8000000.0
CY2021Q4	wldn	Discount On Trade Accounts Receivable Sold DiscountOnTradeAccountsReceivableSold	800000
CY2022	wldn	Number Of Variable Interest Entity NumberOfVariableInterestEntity	1
CY2021	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
CY2021	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
CY2022Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	8500000
CY2021Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	4500000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5503000
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	3286000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	51431000
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	39891000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	28894000
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	23134000
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	22537000
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	16757000
CY2022	us-gaap	Depreciation Depreciation	6300000
CY2021Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1200000
CY2021	us-gaap	Depreciation Depreciation	5600000
CY2021	us-gaap	Depreciation Depreciation	5000000.0
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1100000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	600000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	600000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8806000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11221000
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	28405000
CY2022Q4	us-gaap	Restricted Cash RestrictedCash	10679000
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
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	16903000
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	15036000
CY2022Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	60842000
CY2021Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	68325000
CY2022Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	74546000
CY2021Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	54817000
CY2022Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	8515000
CY2021Q4	us-gaap	Construction Contractor Receivable Retainage ConstructionContractorReceivableRetainage	4472000
CY2022Q4	us-gaap	Accounts Receivable Gross Noncurrent AccountsReceivableGrossNoncurrent	9583000
CY2021Q4	us-gaap	Accounts Receivable Gross Noncurrent AccountsReceivableGrossNoncurrent	12630000
CY2022Q4	wldn	Accounts Receivable Contract With Customer Asset Construction Contractor Receivable Retainage Before Allowance For Credit Loss AccountsReceivableContractWithCustomerAssetConstructionContractorReceivableRetainageBeforeAllowanceForCreditLoss	153486000
CY2021Q4	wldn	Accounts Receivable Contract With Customer Asset Construction Contractor Receivable Retainage Before Allowance For Credit Loss AccountsReceivableContractWithCustomerAssetConstructionContractorReceivableRetainageBeforeAllowanceForCreditLoss	140244000
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	640000
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1115000
CY2022Q4	wldn	Accounts Receivable Contract With Customer Asset Construction Contractor Receivable Retainage After Allowance For Credit Loss AccountsReceivableContractWithCustomerAssetConstructionContractorReceivableRetainageAfterAllowanceForCreditLoss	152846000
CY2021Q4	wldn	Accounts Receivable Contract With Customer Asset Construction Contractor Receivable Retainage After Allowance For Credit Loss AccountsReceivableContractWithCustomerAssetConstructionContractorReceivableRetainageAfterAllowanceForCreditLoss	139129000
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1115000
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2127000
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1147000
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	243000
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	102000
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1329000
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 Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	388000
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	110000
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	39000
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
CY2022Q4	wldn	Accrued Subcontractor Costs AccruedSubcontractorCosts	28374000
CY2021Q4	wldn	Accrued Subcontractor Costs AccruedSubcontractorCosts	19727000
CY2022Q4	wldn	Accrued Rebates And Other Current AccruedRebatesAndOtherCurrent	14643000
CY2021Q4	wldn	Accrued Rebates And Other Current AccruedRebatesAndOtherCurrent	1083000
CY2022Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	8470000
CY2021Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	7767000
CY2022Q4	wldn	Accrued Accounting And Taxes Current AccruedAccountingAndTaxesCurrent	2712000
CY2021Q4	wldn	Accrued Accounting And Taxes Current AccruedAccountingAndTaxesCurrent	2194000
CY2022Q4	wldn	Employee Withholdings EmployeeWithholdings	2571000
CY2021Q4	wldn	Employee Withholdings EmployeeWithholdings	2665000
CY2022Q4	wldn	Compensation And Payroll Taxes Current CompensationAndPayrollTaxesCurrent	2340000
CY2021Q4	wldn	Compensation And Payroll Taxes Current CompensationAndPayrollTaxesCurrent	2244000
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	59110000
CY2021Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	35680000
CY2022Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	107958000
CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	101161000
CY2022Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	511000
CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	587000
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	107447000
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	100574000
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	90544000
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	85538000
CY2022Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	300000
CY2022Q4	wldn	Debt Instrument Composite Interest Rate DebtInstrumentCompositeInterestRate	0.083
CY2022Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	4100000
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	16903000
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	90544000
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	107447000
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
CY2021Q1	us-gaap	Goodwill Goodwill	130124000
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0
CY2021	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	0
CY2021Q4	us-gaap	Goodwill Goodwill	130124000
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	99234000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	57748000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	98924000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	46521000
CY2021Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	310000
CY2022Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	99234000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	57748000
CY2021Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	99234000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	46521000
CY2022	us-gaap	Indefinite Lived Intangible Assets Period Increase Decrease IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease	-300000
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11200000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	11500000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13700000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	16343000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	5503000
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	3286000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	2830000
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	1947000
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2673000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	9928000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	6806000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	6235000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5513000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5513000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	7491000
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	41486000
CY2022	us-gaap	Lease Practical Expedients Package LeasePracticalExpedientsPackage	true
CY2022	us-gaap	Lease Practical Expedient Use Of Hindsight LeasePracticalExpedientUseOfHindsight	false
CY2022	us-gaap	Lessee Operating Lease Existence Of Option To Extend LesseeOperatingLeaseExistenceOfOptionToExtend	true
CY2022	us-gaap	Lessee Operating Lease Existence Of Option To Terminate LesseeOperatingLeaseExistenceOfOptionToTerminate	true
CY2022Q4	us-gaap	Residual Value Of Leased Asset ResidualValueOfLeasedAsset	0
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	6140000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	6497000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	7031000
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1118000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	577000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	589000
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	76000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	34000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	29000
CY2022	us-gaap	Lease Cost LeaseCost	7334000
CY2021	us-gaap	Lease Cost LeaseCost	7108000
CY2021	us-gaap	Lease Cost LeaseCost	7649000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	12390000
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15177000
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4625000
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	5575000
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8599000
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	10768000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	13224000
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	1339000
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1113000
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	539000
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1601000
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	778000
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2714000
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1317000
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y4M6D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y9M14D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y7M28D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y7M13D
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0425
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0428
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0347
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0278
CY2022	wldn	Operating Lease Rent Expenses OperatingLeaseRentExpenses	6500000
CY2021	wldn	Operating Lease Rent Expenses OperatingLeaseRentExpenses	6800000
CY2021	wldn	Operating Lease Rent Expenses OperatingLeaseRentExpenses	7600000
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	6471000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	6727000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	6972000
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	76000
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	34000
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	29000
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1054000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	545000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	549000
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
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3186000
CY2021	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	2000000.0
CY2021	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1500000
CY2022	wldn	Number Of Variable Interest Entity NumberOfVariableInterestEntity	1
CY2021	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
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	5069000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1253000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3630000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	979000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2801000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	381000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2251000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	172000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	453000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	62000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	14204000
CY2022Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	2847000
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	980000
CY2022Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	133000
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	13224000
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	2714000
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	4625000
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1113000
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	8599000
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	1601000
CY2022	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.50
CY2022	wldn	Defined Contribution Plan Employer Matching Contribution Service Period DefinedContributionPlanEmployerMatchingContributionServicePeriod	P3M
CY2022	wldn	Defined Contribution Plan Employer Matching Contribution Age Of Employees DefinedContributionPlanEmployerMatchingContributionAgeOfEmployees	21
CY2022	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.50
CY2022	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2022	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	2300000
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
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	390980000
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	18743000
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-5068000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-19669000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5173000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-14496000
CY2021Q1	us-gaap	Assets Assets	403024000
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
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	390980000
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	390980000
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8400000
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16600000
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16100000
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
CY2021Q1	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	400000
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	2100000
CY2022Q4	us-gaap	Share Price SharePrice	17.85
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
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1124000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	17.80
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y21D
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	119000
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	9.12
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	2000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	2.71
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
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	1003000
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	18.86
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P5Y5M4D
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	952000
CY2021Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	18.16
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P5Y3M21D
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
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	0
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	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
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	166000
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	12.15
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	114000
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	30.97
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
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1224000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1606000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-592000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-73000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	530000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	166000
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	18000
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1519000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2656000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2939000
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
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1826000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3004000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3987000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5173000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
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
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
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-4130000
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
CY2021	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Not Separately Disclosed Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseNotSeparatelyDisclosedAmount	122000
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
CY2021	wldn	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	1386000
CY2022	wldn	Income Tax Reconciliation Nondeductible Expense Incentive Stock Options IncomeTaxReconciliationNondeductibleExpenseIncentiveStockOptions	576000
CY2021	wldn	Income Tax Reconciliation Nondeductible Expense Incentive Stock Options IncomeTaxReconciliationNondeductibleExpenseIncentiveStockOptions	-1276000
CY2021	wldn	Income Tax Reconciliation Nondeductible Expense Incentive Stock Options IncomeTaxReconciliationNondeductibleExpenseIncentiveStockOptions	4000
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
CY2021	wldn	Income Tax Reconciliation Nondeductible Expense Energy Efficient Commercial Building Deduction IncomeTaxReconciliationNondeductibleExpenseEnergyEfficientCommercialBuildingDeduction	-738000
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
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-1205000
CY2021	wldn	Effective Income Tax Rate Reconciliation Uncertain Tax Adjustments Amount EffectiveIncomeTaxRateReconciliationUncertainTaxAdjustmentsAmount	-142000
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	517000
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	761000
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	527000
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
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	96000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-20000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	57000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3004000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3987000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5173000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1374000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1638000
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	23089000
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	22645000
CY2022Q4	wldn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	3592000
CY2021Q4	wldn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	4523000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1404000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	3291000
CY2022Q4	wldn	Deferred Tax Assets Capitalized Research And Development DeferredTaxAssetsCapitalizedResearchAndDevelopment	2078000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1754000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1345000
CY2022Q4	wldn	Deferred Tax Assets Excess Business Interest Limitation DeferredTaxAssetsExcessBusinessInterestLimitation	1437000
CY2021Q4	wldn	Deferred Tax Assets Excess Business Interest Limitation DeferredTaxAssetsExcessBusinessInterestLimitation	646000
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	207000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	345000
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	34935000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	34433000
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1191000
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1191000
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	33744000
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	33242000
CY2022Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	4223000
CY2021Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	3526000
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2778000
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2875000
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	4794000
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	5790000
CY2022Q4	wldn	Deferred Tax Liabilities Lease Right Of Use Asset DeferredTaxLiabilitiesLeaseRightOfUseAsset	3406000
CY2021Q4	wldn	Deferred Tax Liabilities Lease Right Of Use Asset DeferredTaxLiabilitiesLeaseRightOfUseAsset	4202000
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	15201000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	16393000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	18543000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	16849000
CY2022	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	0
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
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-14496000
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-14496000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	13013000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12458000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	11793000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13013000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12458000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	11793000
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.65
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.68
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.23
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.65
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.68
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.23
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
CY2021Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	79086000
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	84154000
CY2021Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	98297000
CY2021Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	92218000
CY2021Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-4189000
CY2021Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-7072000
CY2021Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1443000
CY2021Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1127000
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1458000
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3663000
CY2021Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-236000
CY2021Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1370000
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	-3766000
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-4601000
CY2021Q4	us-gaap	Net Income Loss NetIncomeLoss	840000
CY2021Q4	us-gaap	Net Income Loss NetIncomeLoss	-890000
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.37
CY2021Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2021Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.07
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.37
CY2021Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2021Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12147000
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12421000
CY2021Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12606000
CY2021Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	12660000
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12147000
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12421000
CY2021Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	13141000
CY2021Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	12660000

Files In Submission

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wldn-20221230x10k_htm.xml	Edgar Link	completed

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$WLDN
Willdan Group, Inc. Stock $wldn

2023 Q1 Form 10-K Financial Statement

#000155837023003367 Filed on March 10, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLDN Willdan Group, Inc. Stock $wldn

2023 Q1 Form 10-K Financial Statement

#000155837023003367 Filed on March 10, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLDN
Willdan Group, Inc. Stock $wldn