$LMB
Limbach Holdings, Inc. Stock $lmb

$lmb Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000162828020016246 Filed on November 12, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue	$130.4M	$163.9M	$148.1M
YoY Change	-6.12%	10.62%	9.67%
Cost Of Revenue	$111.7M	$139.7M	$129.7M
YoY Change	-8.59%	7.66%	4.32%
Gross Profit	$18.70M	$24.17M	$18.37M
YoY Change	11.98%	31.56%	71.87%
Gross Profit Margin	14.34%	14.75%	12.4%
Selling, General & Admin	$16.00M	$17.05M	$16.57M
YoY Change	18.52%	2.88%	24.34%
% of Gross Profit	85.56%	70.52%	90.18%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.530M	$1.495M	$1.362M
YoY Change	-25.73%	9.77%	-3.95%
% of Gross Profit	8.18%	6.19%	7.41%
Operating Expenses	$16.10M	$17.15M	$16.72M
YoY Change	18.38%	2.61%	22.66%
Operating Profit	$2.600M	$7.017M	$1.656M
YoY Change	-16.13%	323.73%	-156.35%
Interest Expense	-$2.500M	-$3.500M	-$1.200M
YoY Change	66.67%	191.67%	50.0%
% of Operating Profit	-96.15%	-49.88%	-72.46%
Other Income/Expense, Net		-$3.522M	-$5.576M
YoY Change		-36.84%	642.48%
Pretax Income	$100.0K	$3.495M	-$3.920M
YoY Change	-93.33%	-189.16%	6.23%
Income Tax	-$300.0K	$970.0K	-$942.0K
% Of Pretax Income	-300.0%	27.75%
Net Earnings	$400.0K	$2.525M	-$2.978M
YoY Change	-60.0%	-184.79%	-15.04%
Net Earnings / Revenue	0.31%	1.54%	-2.01%
Basic Earnings Per Share		$0.32	-$0.39
Diluted Earnings Per Share	$47.62K	$0.31	-$0.39
COMMON SHARES
Basic Shares Outstanding	7.926M shares	7.890M shares	7.674M shares
Diluted Shares Outstanding		8.107M shares	7.674M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$42.10M	$39.60M	$800.0K
YoY Change	407.23%	4850.0%	60.0%
Cash & Equivalents	$42.15M	$39.71M	$873.0K
Short-Term Investments
Other Short-Term Assets	$4.282M	$3.908M	$5.049M
YoY Change	-8.11%	-22.6%	-86.28%
Inventory			$46.00M
Prepaid Expenses
Receivables	$85.77M	$124.8M	$110.9M
Other Receivables	$0.00	$700.0K	$0.00
Total Short-Term Assets	$199.4M	$237.7M	$195.2M
YoY Change	2.07%	21.78%	-7.13%
LONG-TERM ASSETS
Property, Plant & Equipment	$38.50M	$40.10M	$21.60M
YoY Change	-8.98%	85.65%	7.84%
Goodwill	$6.129M	$6.100M
YoY Change	0.0%
Intangibles	$11.68M	$11.79M
YoY Change	-5.12%
Long-Term Investments
YoY Change
Other Assets	$392.0K	$461.0K	$6.000M
YoY Change	-41.32%	-92.32%	17042.86%
Total Long-Term Assets	$62.74M	$63.07M	$46.20M
YoY Change	-5.28%	36.5%	-4.74%
TOTAL ASSETS
Total Short-Term Assets	$199.4M	$237.7M	$195.2M
Total Long-Term Assets	$62.74M	$63.07M	$46.20M
Total Assets	$262.2M	$300.8M	$241.4M
YoY Change	0.21%	24.6%	-6.68%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$66.76M	$88.96M	$72.90M
YoY Change	-22.61%	22.03%	21.22%
Accrued Expenses	$24.75M	$28.40M	$33.50M
YoY Change	23.46%	-15.22%	-46.99%
Deferred Revenue	$46.65M	$61.09M	$41.99M
YoY Change	10.1%	45.47%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$6.536M	$6.612M	$3.610M
YoY Change	47.71%	83.16%	-90.14%
Total Short-Term Liabilities	$150.3M	$187.0M	$154.8M
YoY Change	-4.19%	20.8%	-27.1%
LONG-TERM LIABILITIES
Long-Term Debt	$36.51M	$37.46M	$39.65M
YoY Change	-6.06%	-5.51%	1399.55%
Other Long-Term Liabilities	$6.159M	$6.794M	$1.164M
YoY Change	707.21%	483.68%	-1.94%
Total Long-Term Liabilities	$42.67M	$44.26M	$40.81M
YoY Change	7.67%	8.44%	965.31%
TOTAL LIABILITIES
Total Short-Term Liabilities	$150.3M	$187.0M	$154.8M
Total Long-Term Liabilities	$42.67M	$44.26M	$40.81M
Total Liabilities	$208.4M	$247.7M	$196.4M
YoY Change	-2.94%	26.1%	-9.15%
SHAREHOLDERS EQUITY
Retained Earnings	-$3.881M	-$4.268M	-$10.33M
YoY Change	-59.94%	-58.7%	-12.42%
Common Stock	$1.000K	$1.000K
YoY Change	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$53.73M	$53.13M	$45.83M
YoY Change
Total Liabilities & Shareholders Equity	$262.2M	$300.8M	$241.4M
YoY Change	0.21%	24.6%	-6.68%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$400.0K	$2.525M	-$2.978M
YoY Change	-60.0%	-184.79%	-15.04%
Depreciation, Depletion And Amortization	$1.530M	$1.495M	$1.362M
YoY Change	-25.73%	9.77%	-3.95%
Cash From Operating Activities	$4.590M	$12.77M	-$1.920M
YoY Change	-72.43%	-765.1%	-224.68%
INVESTING ACTIVITIES
Capital Expenditures	-$360.0K	-$460.0K	-$960.0K
YoY Change	-23.4%	-52.08%	-27.82%
Acquisitions
YoY Change
Other Investing Activities	$100.0K	$0.00	$70.00K
YoY Change	400.0%	-100.0%	75.0%
Cash From Investing Activities	-$270.0K	-$450.0K	-$890.0K
YoY Change	-40.0%	-49.44%	-31.54%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.770M	-1.540M	2.570M
YoY Change	-79.49%	-159.92%	8466.67%
NET CHANGE
Cash From Operating Activities	4.590M	12.77M	-1.920M
Cash From Investing Activities	-270.0K	-450.0K	-890.0K
Cash From Financing Activities	-1.770M	-1.540M	2.570M
Net Change In Cash	2.550M	10.78M	-240.0K
YoY Change	-66.31%	-4591.67%	-188.89%
FREE CASH FLOW
Cash From Operating Activities	$4.590M	$12.77M	-$1.920M
Capital Expenditures	-$360.0K	-$460.0K	-$960.0K
Free Cash Flow	$4.950M	$13.23M	-$960.0K
YoY Change	-71.09%	-1478.13%	-133.45%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Central Index Key EntityCentralIndexKey	0001606163
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-36541
	dei	Entity Registrant Name EntityRegistrantName	LIMBACH HOLDINGS, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	46-5399422
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1251 Waterfront Place
	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 201
	dei	Entity Address City Or Town EntityAddressCityOrTown	Pittsburgh
	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	15222
	dei	City Area Code CityAreaCode	412
	dei	Local Phone Number LocalPhoneNumber	359-2100
	dei	Security12b Title Security12bTitle	Common Stock, par value $0.0001 per share
	dei	Trading Symbol TradingSymbol	LMB
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-52000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	47113000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	140000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	2947000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	50200000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	304000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	98000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	0	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2525000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	53127000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	46368000	USD
CY2019Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	367000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	1847000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	49093000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	515000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-1289000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	48319000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	491000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-2978000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	45832000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5420000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-2420000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4635000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4234000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4359000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	62000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	104000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	739000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1373000	USD
	lmb	Noncash Operating Lease Expense NoncashOperatingLeaseExpense	3033000	USD
	lmb	Noncash Operating Lease Expense NoncashOperatingLeaseExpense	2789000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1620000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	901000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	211000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-775000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	18000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	38000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-513000	USD
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	1312000	USD
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-422000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	19834000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	5223000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-8612000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	15768000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-270000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-29733000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2695000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1406000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-192000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	77000	USD
	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	1947000	USD
	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	63000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	18715000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-6826000	USD
	lmb	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-3229000	USD
	lmb	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-2789000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	8925000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-25961000	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	306000	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-102000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	35229000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-17584000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	65000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	148000	USD
	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	3000	USD
	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	-3000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1116000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2192000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1054000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2041000	USD
	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	0	USD
	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	6102000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	14335000	USD
	lmb	Proceedsfrom Credit Agreement Revolver ProceedsfromCreditAgreementRevolver	0	USD
	lmb	Proceedsfrom Credit Agreement Revolver ProceedsfromCreditAgreementRevolver	17500000	USD
	lmb	Payments On Credit Agreement Revolver PaymentsOnCreditAgreementRevolver	0	USD
	lmb	Payments On Credit Agreement Revolver PaymentsOnCreditAgreementRevolver	17500000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	7250000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	19250000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	7250000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	19250000	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1000000	USD
	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
	lmb	Proceedsfrom Long Term Linesof Credit Net ProceedsfromLongTermLinesofCreditNet	0	USD
	lmb	Proceedsfrom Long Term Linesof Credit Net ProceedsfromLongTermLinesofCreditNet	38643000	USD
	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	969000	USD
	lmb	Embedded Derivative Issued EmbeddedDerivativeIssued	0	USD
	lmb	Embedded Derivative Issued EmbeddedDerivativeIssued	388000	USD
	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	0	USD
	us-gaap	Repayments Of Other Short Term Debt RepaymentsOfOtherShortTermDebt	7736000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3022000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	2399000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1966000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1803000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3339000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	102000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	123000	USD
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	149000	USD
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	0	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2919000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	18766000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	31256000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-859000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8457000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1732000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	39713000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	873000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	924000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	2685000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Operating Lease Liability RightofUseAssetDisposedorAdjustedModifyingOperatingLeaseLiability	586000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Operating Lease Liability RightofUseAssetDisposedorAdjustedModifyingOperatingLeaseLiability	1651000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Finance Lease Liability RightofUseAssetDisposedorAdjustedModifyingFinanceLeaseLiability	-64000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Finance Lease Liability RightofUseAssetDisposedorAdjustedModifyingFinanceLeaseLiability	-55000	USD
	us-gaap	Interest Paid InterestPaid	4817000	USD
	us-gaap	Interest Paid InterestPaid	3091000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
	lmb	Service Period ServicePeriod	P2Y
	lmb	Covid19 Relief Percentageof Salary Reduction COVID19ReliefPercentageofSalaryReduction	0.10
	lmb	Covid19 Relief Percentageof Salary Reduction COVID19ReliefPercentageofSalaryReduction	0.10
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	110940000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	79577000	USD
CY2019Q3	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	0	USD
CY2019Q3	us-gaap	Other Assets Current OtherAssetsCurrent	5049000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	21714000	USD
CY2019Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	4952000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	41991000	USD
CY2019Q3	us-gaap	Billings In Excess Of Cost Current BillingsInExcessOfCostCurrent	0	USD
CY2019Q3	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	36211000	USD
CY2019Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	3610000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3756000	USD
CY2019Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	39648000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	18753000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1164000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-10333000	USD
CY2019Q3	us-gaap	Revenues Revenues	148119000	USD
CY2019Q3	us-gaap	Cost Of Revenue CostOfRevenue	129746000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	18373000	USD
CY2019Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	16568000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	149000	USD
CY2019Q3	us-gaap	Operating Expenses OperatingExpenses	16717000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1656000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-1759000	USD
CY2019Q3	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	17000	USD
CY2019Q3	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-525000	USD
CY2019Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4359000	USD
CY2019Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5576000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-3920000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-942000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-2978000	USD
	us-gaap	Revenues Revenues	414469000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	358778000	USD
	us-gaap	Gross Profit GrossProfit	55691000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	49691000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	499000	USD
	us-gaap	Operating Expenses OperatingExpenses	50190000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	5501000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-4190000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	38000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-513000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	105067000	USD
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-422000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4359000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-8602000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-3101000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-681000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-2420000	USD
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	125116000	USD
CY2019Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	105373000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	277000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	306000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	124839000	USD
CY2020Q3	lmb	Costs And Estimated Earnings In Excess Of Billings On Contracts CostsAndEstimatedEarningsInExcessOfBillingsOnContracts	31235000	USD
CY2019Q4	lmb	Costs And Estimated Earnings In Excess Of Billings On Contracts CostsAndEstimatedEarningsInExcessOfBillingsOnContracts	44315000	USD
	lmb	Increase Decreasein Costsand Estimated Earnings In Excess Of Billings On Contracts IncreaseDecreaseinCostsandEstimatedEarningsInExcessOfBillingsOnContracts	-13080000	USD
CY2020Q3	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	37341000	USD
CY2019Q4	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	32873000	USD
	lmb	Increase Decreasein Contract Receivable Retainage IncreaseDecreaseinContractReceivableRetainage	4468000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	68576000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	77188000	USD
	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-8612000	USD
	lmb	Retainage Receivable Percentage RetainageReceivablePercentage	0.10
CY2020Q3	lmb	Contract With Customer Asset Claims And Unapproved Change Orders Current ContractWithCustomerAssetClaimsAndUnapprovedChangeOrdersCurrent	38000000.0	USD
CY2019Q4	lmb	Contract With Customer Asset Claims And Unapproved Change Orders Current ContractWithCustomerAssetClaimsAndUnapprovedChangeOrdersCurrent	38400000	USD
CY2020Q3	lmb	Billings In Excess Of Costs And Estimated Earnings On Contracts BillingsInExcessOfCostsAndEstimatedEarningsOnContracts	60272000	USD
CY2019Q4	lmb	Billings In Excess Of Costs And Estimated Earnings On Contracts BillingsInExcessOfCostsAndEstimatedEarningsOnContracts	40662000	USD
	lmb	Increase Decreasein Billings In Excess Of Costs And Estimated Earnings On Contracts IncreaseDecreaseinBillingsInExcessOfCostsAndEstimatedEarningsOnContracts	19610000	USD
CY2020Q3	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	813000	USD
CY2019Q4	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	1708000	USD
	lmb	Increase Decreasein Provisionfor Losson Contracts IncreaseDecreaseinProvisionforLossonContracts	-895000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	61085000	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	42370000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	18715000	USD
CY2020Q3	lmb	Revenue Earned On Uncompleted Contracts RevenueEarnedOnUncompletedContracts	696558000	USD
CY2019Q4	lmb	Revenue Earned On Uncompleted Contracts RevenueEarnedOnUncompletedContracts	726215000	USD
CY2020Q3	lmb	Billings To Date On Contracts BillingsToDateOnContracts	725595000	USD
CY2019Q4	lmb	Billings To Date On Contracts BillingsToDateOnContracts	722562000	USD
CY2020Q3	lmb	Net Under Overbilling On Contracts NetUnderOverbillingOnContracts	29037000	USD
CY2019Q4	lmb	Net Under Overbilling On Contracts NetUnderOverbillingOnContracts	-3653000	USD
CY2020Q3	lmb	Costsin Excessof Billingsand Estimated Earningson Uncompleted Contracts CostsinExcessofBillingsandEstimatedEarningsonUncompletedContracts	31235000	USD
CY2019Q4	lmb	Costsin Excessof Billingsand Estimated Earningson Uncompleted Contracts CostsinExcessofBillingsandEstimatedEarningsonUncompletedContracts	44315000	USD
CY2020Q3	lmb	Billingsin Excessof Billingsand Estimated Earningson Uncompleted Contracts BillingsinExcessofBillingsandEstimatedEarningsonUncompletedContracts	60272000	USD
CY2019Q4	lmb	Billingsin Excessof Billingsand Estimated Earningson Uncompleted Contracts BillingsinExcessofBillingsandEstimatedEarningsonUncompletedContracts	40662000	USD
CY2020Q3	lmb	Net Under Overbilling On Contracts NetUnderOverbillingOnContracts	29037000	USD
CY2019Q4	lmb	Net Under Overbilling On Contracts NetUnderOverbillingOnContracts	-3653000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	6100000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	6100000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	5240000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	3415000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	1825000	USD
CY2020Q3	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	9960000	USD
CY2020Q3	lmb	Intangible Assets Amortized Excluding Goodwill IntangibleAssetsAmortizedExcludingGoodwill	9960000	USD
CY2020Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	15200000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	3415000	USD
CY2020Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	11785000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	5240000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2889000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2351000	USD
CY2019Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	9960000	USD
CY2019Q4	lmb	Intangible Assets Amortized Excluding Goodwill IntangibleAssetsAmortizedExcludingGoodwill	9960000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	15200000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2889000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	12311000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	100000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	500000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	100000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	500000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020Q3	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	40000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	41000000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	6954000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	6585000	USD
CY2020Q3	lmb	Longterm Debt Grossand Lease Obligation LongtermDebtGrossandLeaseObligation	46954000	USD
CY2019Q4	lmb	Longterm Debt Grossand Lease Obligation LongtermDebtGrossandLeaseObligation	47585000	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	6612000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	4425000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	2880000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	4292000	USD
CY2020Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	37462000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	38868000	USD
CY2019	lmb	Percentage Of Number Of Shares PercentageOfNumberOfShares	0.02
CY2020Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2020Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2020Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2020Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2019Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	4576799	shares
CY2020Q3	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	4576799	shares
CY2019Q3	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	11.50
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	100000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2525000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-2978000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5420000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-2420000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7890000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7674000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7845000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7653000	shares
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	217000	shares
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	125000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8107000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7674000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7970000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7653000	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.39
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.69
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.32
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.39
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.32
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4585174	shares
CY2020Q3	lmb	Finance Lease Rightof Use Asset Accumulated Amortization FinanceLeaseRightofUseAssetAccumulatedAmortization	5300000	USD
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4695539	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4581712	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4672798	shares
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.278
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.211
CY2019Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.240
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.220
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	500000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	400000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020Q3	us-gaap	Revenues Revenues	163856000	USD
CY2019Q3	us-gaap	Revenues Revenues	148119000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	24171000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	18373000	USD
CY2020Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	17045000	USD
CY2019Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	16568000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	109000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	149000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	7017000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1656000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	7017000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1656000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-2154000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-1759000	USD
CY2020Q3	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	3000	USD
CY2019Q3	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	17000	USD
CY2020Q3	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	1371000	USD
CY2019Q3	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-525000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3495000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-3920000	USD
CY2020Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1495000	USD
CY2019Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1362000	USD
	us-gaap	Revenues Revenues	437813000	USD
	us-gaap	Revenues Revenues	414469000	USD
	us-gaap	Gross Profit GrossProfit	62730000	USD
	us-gaap	Gross Profit GrossProfit	55691000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	47596000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	49691000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	526000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	499000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	14608000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	5501000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	14608000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	5501000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-6449000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-4190000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	18000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	38000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-513000	USD
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	1312000	USD
	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-422000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	6865000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-3101000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4635000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4234000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	19533000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	21056000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	6747000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	6412000	USD
CY2020Q3	lmb	Lease Rightof Use Asset LeaseRightofUseAsset	26280000	USD
CY2019Q4	lmb	Lease Rightof Use Asset LeaseRightofUseAsset	27468000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3875000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3750000	USD
CY2020Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2612000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2424000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	16402000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	18247000	USD
CY2020Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	4342000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	4161000	USD
CY2020Q3	lmb	Lease Liability LeaseLiability	27231000	USD
CY2019Q4	lmb	Lease Liability LeaseLiability	28582000	USD
CY2020Q3	lmb	Operating Lease Rightof Use Asset Accumulated Amortization OperatingLeaseRightofUseAssetAccumulatedAmortization	10900000	USD
CY2019Q4	lmb	Operating Lease Rightof Use Asset Accumulated Amortization OperatingLeaseRightofUseAssetAccumulatedAmortization	8500000	USD
CY2019Q4	lmb	Finance Lease Rightof Use Asset Accumulated Amortization FinanceLeaseRightofUseAssetAccumulatedAmortization	4700000	USD
CY2020Q3	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	684000	USD
CY2019Q3	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	650000	USD
	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	2001000	USD
	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1833000	USD
CY2020Q3	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	89000	USD
CY2019Q3	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	86000	USD
	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	269000	USD
	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	239000	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	2010000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	1985000	USD
	us-gaap	Lease Cost LeaseCost	6038000	USD
	us-gaap	Lease Cost LeaseCost	5659000	USD
	us-gaap	Malpractice Insurance Annual Coverage Limit MalpracticeInsuranceAnnualCoverageLimit	4600000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	789000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	1200000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	2784000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4777000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	2256000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4514000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1261000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3516000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	449000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2917000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	1000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	6451000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	7540000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	23375000	USD
CY2020Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	586000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	6954000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y8M15D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y2M12D
CY2020Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y10M28D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y11M15D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0483
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0480
CY2020Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0552
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0569
	us-gaap	Operating Lease Payments OperatingLeasePayments	3963000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	3490000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	269000	USD
	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	239000	USD
	lmb	Finance Lease Principaland Disposals Payments FinanceLeasePrincipalandDisposalsPayments	1966000	USD
	lmb	Finance Lease Principaland Disposals Payments FinanceLeasePrincipalandDisposalsPayments	1803000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	924000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3022000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	2399000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	2685000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Operating Lease Liability RightofUseAssetDisposedorAdjustedModifyingOperatingLeaseLiability	586000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Operating Lease Liability RightofUseAssetDisposedorAdjustedModifyingOperatingLeaseLiability	1651000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Finance Lease Liability RightofUseAssetDisposedorAdjustedModifyingFinanceLeaseLiability	-64000	USD
	lmb	Rightof Use Asset Disposedor Adjusted Modifying Finance Lease Liability RightofUseAssetDisposedorAdjustedModifyingFinanceLeaseLiability	-55000	USD
	lmb	Payment To Acquire Workers Compensation And General Liability Insurance PaymentToAcquireWorkersCompensationAndGeneralLiabilityInsurance	250000	USD
	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	The components of the self-insurance liability as of September 30, 2020 and December 31, 2019 are as follows:<table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:95.906%"><tr><td style="width:1.0%"/><td style="width:70.089%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:13.686%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.562%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.163%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">As of September 30,<br/>2020</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">As of December 31,<br/>2019</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Current liability — workers’ compensation and general liability</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">434 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">703 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Current liability — medical and dental</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">482 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">821 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Non-current liability</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">667 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">382 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total liability shown in Accrued expenses and other current liabilities</span></div></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,583 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,906 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted cash</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">113 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">113 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table>
CY2020Q3	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	434000	USD
CY2019Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	703000	USD
CY2020Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	482000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	821000	USD
CY2020Q3	us-gaap	Accounts Payable And Accrued Liabilities Noncurrent AccountsPayableAndAccruedLiabilitiesNoncurrent	667000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Noncurrent AccountsPayableAndAccruedLiabilitiesNoncurrent	382000	USD
CY2020Q3	us-gaap	Other Liabilities OtherLiabilities	1583000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	1906000	USD
CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	113000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	113000	USD
CY2018Q4	lmb	Other Current Assets Liabilities OtherCurrentAssetsLiabilities	30000000.0	USD
CY2018Q4	lmb	Other Current Assets Liabilities OtherCurrentAssetsLiabilities	30000000.0	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P24M
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	100000	USD

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0001628280-20-016246-index-headers.html	Edgar Link	pending
0001628280-20-016246-index.html	Edgar Link	pending
0001628280-20-016246.txt	Edgar Link	pending
0001628280-20-016246-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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lmb-20200930_htm.xml	Edgar Link	completed
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2020 Q4 Form 10-Q Financial Statement

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2020 Q4 Form 10-Q Financial Statement

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Income Statement

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