$IESC
IES Holdings, Inc. Stock $iesc

$iesc Overview Financials Valuation SEC Filings Company Website

2018 Form 10-K Financial Statement

#000119312518344274 Filed on December 07, 2018

Income Statement

Concept	2018	2017 Q3	2017 Q2
Revenue	$876.8M	$206.6M	$208.3M
YoY Change	8.15%	0.45%	15.99%
Cost Of Revenue	$726.9M	$168.5M	$172.9M
YoY Change	8.45%	0.24%	18.75%
Gross Profit	$150.0M	$38.10M	$35.40M
YoY Change	6.74%	1.51%	4.12%
Gross Profit Margin	17.1%	18.45%	16.99%
Selling, General & Admin	$123.9M	$31.30M	$30.80M
YoY Change	2.95%	11.39%	19.84%
% of Gross Profit	82.63%	82.14%	87.01%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.860M	$2.750M	$2.506M
YoY Change	-8.03%	27.31%	51.33%
% of Gross Profit	5.91%	7.22%	7.08%
Operating Expenses	$123.9M	$31.10M	$30.80M
YoY Change	2.95%	9.51%	19.38%
Operating Profit	$25.95M	$7.004M	$4.598M
YoY Change	27.59%	-23.35%	-43.91%
Interest Expense	$1.946M	-$400.0K	-$400.0K
YoY Change	14.34%	0.0%	33.33%
% of Operating Profit	7.5%	-5.71%	-8.7%
Other Income/Expense, Net	$340.0K	$100.0K	$0.00
YoY Change	106.06%
Pretax Income	$24.35M	$6.700M	$4.400M
YoY Change	29.48%	-23.86%	-44.3%
Income Tax	$38.15M	$3.400M	-$1.500M
% Of Pretax Income	156.69%	50.75%	-34.09%
Net Earnings	-$14.16M	$3.146M	$5.868M
YoY Change	-205.48%	-96.92%	-45.69%
Net Earnings / Revenue	-1.61%	1.52%	2.82%
Basic Earnings Per Share	-$0.67
Diluted Earnings Per Share	-$0.67	$144.2K	$273.1K
COMMON SHARES
Basic Shares Outstanding	21.20M shares	21.43M shares	21.47M shares
Diluted Shares Outstanding	21.20M shares

Balance Sheet

Concept	2018	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$26.20M	$28.30M	$23.90M
YoY Change	-7.42%	-14.24%	4.82%
Cash & Equivalents	$26.20M	$28.29M	$23.91M
Short-Term Investments
Other Short-Term Assets	$8.100M	$8.800M	$4.700M
YoY Change	-7.95%	151.43%	2.17%
Inventory	$21.00M	$16.92M	$18.99M
Prepaid Expenses
Receivables	$207.3M	$142.9M	$132.9M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$262.7M	$231.8M	$223.8M
YoY Change	13.33%	10.5%	21.09%
LONG-TERM ASSETS
Property, Plant & Equipment	$25.40M	$24.64M	$24.64M
YoY Change	3.25%	57.02%	61.06%
Goodwill		$46.69M	$45.03M
YoY Change		16.92%
Intangibles		$31.41M	$31.50M
YoY Change		-0.98%
Long-Term Investments	$600.0K
YoY Change	0.0%
Other Assets	$52.10M	$3.782M	$3.345M
YoY Change	-41.72%	1.94%	-31.73%
Total Long-Term Assets	$159.3M	$192.7M	$193.4M
YoY Change	-17.33%	4.4%	108.56%
TOTAL ASSETS
Total Short-Term Assets	$262.7M	$231.8M	$223.8M
Total Long-Term Assets	$159.3M	$192.7M	$193.4M
Total Assets	$422.0M	$424.5M	$417.2M
YoY Change	-0.59%	7.65%	50.31%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$75.30M	$120.7M	$116.2M
YoY Change	19.15%	10.94%	28.11%
Accrued Expenses	$55.30M
YoY Change	-3.83%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$164.4M	$150.6M	$146.9M
YoY Change	9.16%	13.21%	24.08%
LONG-TERM LIABILITIES
Long-Term Debt	$29.60M	$29.43M	$29.41M
YoY Change	0.68%	0.6%	-2.63%
Other Long-Term Liabilities	$4.400M	$4.457M	$4.433M
YoY Change	-2.22%	-34.76%	-34.81%
Total Long-Term Liabilities	$34.00M	$33.89M	$33.84M
YoY Change	0.29%	-6.09%	-8.54%
TOTAL LIABILITIES
Total Short-Term Liabilities	$164.4M	$150.6M	$146.9M
Total Long-Term Liabilities	$34.00M	$33.89M	$33.84M
Total Liabilities	$201.6M	$184.5M	$180.8M
YoY Change	7.35%	9.09%	15.06%
SHAREHOLDERS EQUITY
Retained Earnings		$46.43M	$43.33M
YoY Change		41.78%
Common Stock		$220.0K	$220.0K
YoY Change		0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$6.898M	$5.399M
YoY Change		44.28%
Treasury Stock Shares		712.6K shares	615.4K shares
Shareholders Equity	$220.4M	$236.7M	$234.7M
YoY Change
Total Liabilities & Shareholders Equity	$422.0M	$424.5M	$417.2M
YoY Change	-0.59%	7.65%	50.33%

Cashflow Statement

Concept	2018	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	-$14.16M	$3.146M	$5.868M
YoY Change	-205.48%	-96.92%	-45.69%
Depreciation, Depletion And Amortization	$8.860M	$2.750M	$2.506M
YoY Change	-8.03%	27.31%	51.33%
Cash From Operating Activities	$12.22M	$12.15M	$7.540M
YoY Change	-45.3%	9.76%	-270.59%
INVESTING ACTIVITIES
Capital Expenditures	$4.563M	-$790.0K	-$910.0K
YoY Change	-0.57%	-37.3%	-15.74%
Acquisitions	$7.406M
YoY Change	-63.36%
Other Investing Activities	-$7.300M	-$5.520M	-$2.780M
YoY Change	-63.39%	-3166.67%	-94.35%
Cash From Investing Activities	-$11.86M	-$6.310M	-$3.690M
YoY Change	-51.65%	478.9%	-92.66%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$2.048M
YoY Change	-4.7%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$2.406M	-1.450M	-800.0K
YoY Change	-12.45%	-437.21%	-104.16%
NET CHANGE
Cash From Operating Activities	$12.22M	12.15M	7.540M
Cash From Investing Activities	-$11.86M	-6.310M	-3.690M
Cash From Financing Activities	-$2.406M	-1.450M	-800.0K
Net Change In Cash	-$2.043M	4.390M	3.050M
YoY Change	-58.57%	-57.83%	-108.6%
FREE CASH FLOW
Cash From Operating Activities	$12.22M	$12.15M	$7.540M
Capital Expenditures	$4.563M	-$790.0K	-$910.0K
Free Cash Flow	$7.661M	$12.94M	$8.450M
YoY Change	-56.86%	4.95%	-352.99%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	4563000	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	4589000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	590000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	140668	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	31409	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	7500	shares
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	0	shares
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	174334	shares
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	44250	shares
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	79500	shares
CY2018Q3	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	44250	shares
CY2018Q3	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	44250	shares
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2018Q1	us-gaap	Gross Profit GrossProfit	33840000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	360000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	1415000	USD
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	5.17
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	3.6
CY2015Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	5.79
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.43
CY2018Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	6.39
CY2018Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	21205536	shares
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2015Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	101414000	USD
CY2016Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	223405000	USD
CY2017Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	236704000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	296000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	294000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9634000	USD
CY2017	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	69000	USD
CY2017	us-gaap	Restricted Stock Expense RestrictedStockExpense	1707000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7621000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1856000	USD
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CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6798000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	510000	USD
CY2017	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	5898000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12224000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4589000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	270000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	20213000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-24532000	USD
CY2017	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	5434000	USD
CY2017	us-gaap	Repayments Of Debt RepaymentsOfDebt	5432000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2748000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-4931000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	345000	USD
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CY2016	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-810000	USD
CY2016	us-gaap	Restricted Stock Expense RestrictedStockExpense	1583000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	22439000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-3897000	USD
CY2016	us-gaap	Increase Decrease In Cost In Excess Of Billing On Uncompleted Contract IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract	3236000	USD
CY2016	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	1500000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	19676000	USD
CY2016	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-936000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2225000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	59544000	USD
CY2016	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	20289000	USD
CY2018	us-gaap	Interest Paid InterestPaid	1684000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	2839000	USD
CY2017	us-gaap	Interest Paid InterestPaid	1521000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	2429000	USD
CY2016	us-gaap	Interest Paid InterestPaid	1009000	USD
CY2018Q3	iesc	Estimatedundiscountedultimatelossesinnexttwelvemonths Estimatedundiscountedultimatelossesinnexttwelvemonths	1748000	USD
CY2018Q3	iesc	Estimatedundiscountedultimatelossesinyeartwo Estimatedundiscountedultimatelossesinyeartwo	1144000	USD
CY2018Q3	iesc	Estimatedundiscountedultimatelossesinyearthree Estimatedundiscountedultimatelossesinyearthree	746000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	380000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	294000	USD
CY2018Q3	iesc	Estimatedundiscountedultimatelossesinyearfour Estimatedundiscountedultimatelossesinyearfour	429000	USD
CY2018Q3	iesc	Estimatedundiscountedultimatelossesinyearfive Estimatedundiscountedultimatelossesinyearfive	216000	USD
CY2018Q3	iesc	Estimatedundiscountedultimatelossesthereafter Estimatedundiscountedultimatelossesthereafter	1003000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	50703000	USD
CY2018Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	274000	USD
CY2018Q3	us-gaap	Accounts Payable Trade Current And Noncurrent AccountsPayableTradeCurrentAndNoncurrent	75293000	USD
CY2018Q3	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	34058000	USD
CY2018Q3	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	15038000	USD
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CY2017Q3	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	17699000	USD
CY2018Q3	iesc	Billings To Date BillingsToDate	-541606000	USD
CY2018Q3	iesc	Contracts In Process Net ContractsInProcessNet	-2380000	USD
CY2017Q3	iesc	Billings To Date BillingsToDate	-559036000	USD
CY2017Q3	iesc	Contracts In Process Net ContractsInProcessNet	-16480000	USD
CY2018Q3	iesc	Contracts In Process Net From Balance Sheet ContractsInProcessNetFromBalanceSheet	-2380000	USD
CY2017Q3	iesc	Contracts In Process Net From Balance Sheet ContractsInProcessNetFromBalanceSheet	-16480000	USD
CY2018Q3	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	747000	USD
CY2018Q3	us-gaap	Investments Investments	558000	USD
CY2017Q3	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	641000	USD
CY2017Q3	us-gaap	Investments Investments	558000	USD
CY2017Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	2583000	USD
CY2018Q3	us-gaap	Cost Method Investments CostMethodInvestments	558000	USD
CY2018Q3	us-gaap	Cost Method Investments Fair Value Disclosure CostMethodInvestmentsFairValueDisclosure	782000	USD
CY2017Q3	us-gaap	Cost Method Investments Fair Value Disclosure CostMethodInvestmentsFairValueDisclosure	729000	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	224000	USD
CY2017	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	171000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2345000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	38744000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-3092000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	6384000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	762000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-97093000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1536000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	216000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1432000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	487000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	952000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1738000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5973000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	12915000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	77497000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1807000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	82000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1570000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	337000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3195000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	97646000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	95280000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	86211000	USD
CY2016Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	55867000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	51968000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	100000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	13000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	272000	USD
CY2017	us-gaap	Revenues Revenues	810744000	USD
CY2017Q3	us-gaap	Revenues Revenues	206581000	USD
CY2016Q4	us-gaap	Gross Profit GrossProfit	35182000	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	31814000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	35398000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	38104000	USD
CY2018Q3	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	755000	USD
CY2017Q3	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	815000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	7680000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	3944000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	3247000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	3515000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3157000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2780000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	13947000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	30590000	USD
CY2018Q3	us-gaap	Revenues Revenues	240275000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	40521000	USD
CY2017Q4	us-gaap	Revenues Revenues	198300000	USD
CY2018Q1	us-gaap	Revenues Revenues	205677000	USD
CY2018Q2	us-gaap	Revenues Revenues	232576000	USD
CY2017Q4	us-gaap	Gross Profit GrossProfit	33064000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	42537000	USD
CY2016Q4	us-gaap	Revenues Revenues	192178000	USD
CY2017Q1	us-gaap	Revenues Revenues	203662000	USD
CY2017Q2	us-gaap	Revenues Revenues	208323000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	6990000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	5868000	USD
CY2018Q1	dei	Entity Public Float EntityPublicFloat	125188131	USD
CY2016Q3	us-gaap	Assets Assets	394340000	USD
CY2017Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2017Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2017Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	22049529	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.67
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.67
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.63
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.62
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21279342	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21492339	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21196388	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21196388	shares
CY2016	us-gaap	Revenues Revenues	695993000	USD
CY2016	us-gaap	Cost Of Services CostOfServices	569013000	USD
CY2016	us-gaap	Gross Profit GrossProfit	126980000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	100558000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-810000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	24960000	USD
CY2016	us-gaap	Interest Expense InterestExpense	1282000	USD
CY2016	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	83000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23761000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-97117000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	120878000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-2829000	USD
CY2018	us-gaap	Revenues Revenues	876828000	USD
CY2018	us-gaap	Cost Of Services CostOfServices	726866000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	120778000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	25954000	USD
CY2018	us-gaap	Interest Expense InterestExpense	1946000	USD
CY2018	us-gaap	Gross Profit GrossProfit	149962000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	123920000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	15000	USD
CY2018	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	340000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24348000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	38151000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	-13803000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-14157000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	1139000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	218000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	220000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1716000	USD
CY2016	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-16000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3417000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	24968000	USD
CY2016	us-gaap	Repayments Of Debt RepaymentsOfDebt	290000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	590000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	19629000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-16139000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-60736000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2367000	USD
CY2018Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	25613000	USD
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;color:#000000;' >Use of Estimates</font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;color:#000000;' >The preparation of financial statements in conformity with </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >accounting principles generally accepted in the United States of America (“</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >GAAP”)</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > requires the use of estimates and assumptions by management in determining the reported amounts of assets and liabilities, disclosures of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses duri</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >ng the reporting period. Actual results could differ from those estimates. Estimates are primarily used in our revenue recognition of construction in progress, fair value assumptions in</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > accounting for business combinations and</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > analyzing goodwill, investmen</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >ts, intangible assets and long-lived asset impairments and adjustments, allowance for doubtful accounts receivable, stock-based compensation, reserves for legal matters, realizability of deferred tax assets, </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >unrecognized tax benefits </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >and self-insured claim</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >s liabilities and related reserves.</font></p></div>
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-29569000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	0	USD
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;color:#000000;' >Risk Concentration</font></p><p style='text-align:justify;line-height:12pt;' ></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;color:#000000;' >Financial instruments, which potentially subject us to concentrations of credit risk, consist principally of cash deposits and accounts receivable. </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Through delayed payment terms, we at times </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >grant credit, usually without collateral, to our customers, who are generally large public companies, contractors and homebuilders throughout the United States. Consequently, we are subject to potential credit risk related to changes in business and econom</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >ic factors throughout the </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >United States</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >, specifically, within the construction, homebuilding and mission critical facility markets. However, we are entitled to payment for work performed and generally have certain lien rights in that work. Further, managem</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >ent believes that its contract acceptance, billing and collection policies are adequate to manage potential credit risk. We routinely maintain cash balances in financial institutions in excess of federally insured limits. We periodically assess the financi</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >al condition of these institutions where these funds are held and believe the credit risk is minimal. We maintain the majority of our cash and cash equivalents in money market mutual funds. There can be no assurance, however, that we will not be adversely </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >affected by credit risks we face. </font></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;color:#000000;' > </font></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;color:#000000;' >No single customer accounted for more than 10% of our consolidated revenues for the years ended </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >September 30, </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2018</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >, </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2017</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > and </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2016</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >.</font></p></div>
CY2018	iesc	Number Of Single Customers Comprising More Than Ten Percent Of Consolidated Net Sales NumberOfSingleCustomersComprisingMoreThanTenPercentOfConsolidatedNetSales	0	pure
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4101000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5766000	USD
CY2018Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	4453000	USD
CY2018Q3	us-gaap	Inventory Work In Process InventoryWorkInProcess	5168000	USD
CY2018Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	1746000	USD
CY2018Q3	us-gaap	Other Inventory OtherInventory	9599000	USD
CY2017Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	4104000	USD
CY2017Q3	us-gaap	Inventory Work In Process InventoryWorkInProcess	3731000	USD
CY2017Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	1692000	USD
CY2017Q3	us-gaap	Other Inventory OtherInventory	7396000	USD
CY2018	iesc	Costs Incurred Contract In Progress CostsIncurredContractInProgress	476609000	USD
CY2018	iesc	Estimated Profit On Contract In Progress EstimatedProfitOnContractInProgress	539226000	USD
CY2017	iesc	Costs Incurred Contract In Progress CostsIncurredContractInProgress	486950000	USD
CY2017	iesc	Estimated Profit On Contract In Progress EstimatedProfitOnContractInProgress	542556000	USD
CY2017Q3	us-gaap	Cost Method Investments CostMethodInvestments	558000	USD
CY2016Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	736000	USD
CY2018Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	6609000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	207000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	8054000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	46881000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1172000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	119000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	665000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	94000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	712000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	57904000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	53777000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	46580000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1122000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	5499000	USD
CY2018Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	576000	USD
CY2018Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7197000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	4127000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2366000	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2019000	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	6548000	USD
CY2017Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	502000	USD
CY2017Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9069000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	207000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3707000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3361000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6582000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8316000	USD
CY2017Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3782000	USD
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-09-30
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	6.46
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.42
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	45750	shares
CY2015Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	133000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	0	shares
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	220000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	0	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	0	shares
CY2018	dei	Trading Symbol TradingSymbol	IESC
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21280549	shares
CY2017	us-gaap	Cost Of Services CostOfServices	670246000	USD
CY2017	us-gaap	Gross Profit GrossProfit	140498000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	120370000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	69000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	20342000	USD
CY2017	us-gaap	Interest Expense InterestExpense	1702000	USD
CY2017	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	165000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	18805000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5211000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	13594000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	13422000	USD
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21533254	shares
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1583000	USD
CY2018	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div><table style='border-collapse:collapse;' ><tr style='height:12.75pt;' ><td colspan='2' rowspan='1' style='width:119.25pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:119.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Year Ended September 30:</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' ></font></td><td style='width:55.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' ></font></td></tr><tr style='height:12.75pt;' ><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:114.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:114.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2019</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >$</font></td><td style='width:55.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >1,748</font></td></tr><tr style='height:12.75pt;' ><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:114.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:114.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2020</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:55.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >1,144</font></td></tr><tr style='height:12.75pt;' ><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:114.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:114.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2021</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:55.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >746</font></td></tr><tr style='height:12.75pt;' ><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:114.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:114.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2022</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:55.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >429</font></td></tr><tr style='height:12.75pt;' ><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:114.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:114.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >2023</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:1pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:55.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >216</font></td></tr><tr style='height:12.75pt;' ><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:114.75pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:114.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Thereafter</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:9.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:55.5pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >1,003</font></td></tr><tr style='height:13.5pt;' ><td colspan='2' rowspan='1' style='width:119.25pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:119.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Total</font></td><td style='width:4.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:4.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' ></font></td><td style='width:9.75pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:left;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >$</font></td><td style='width:55.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:right;vertical-align:bottom;border-color:Black;min-width:55.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >5,286</font></td></tr></table></div>
CY2018	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<div><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;color:#000000;' >Asset Impairment</font></p><p style='text-align:justify;line-height:12pt;' ></p><p style='text-align:justify;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >During the fiscal years </font><font style='font-family:Times New Roman;font-size:10pt;' >ended </font><font style='font-family:Times New Roman;font-size:10pt;' >September 30, </font><font style='font-family:Times New Roman;font-size:10pt;' >2018</font><font style='font-family:Times New Roman;font-size:10pt;' >, </font><font style='font-family:Times New Roman;font-size:10pt;' >2017</font><font style='font-family:Times New Roman;font-size:10pt;' > and </font><font style='font-family:Times New Roman;font-size:10pt;' >2016</font><font style='font-family:Times New Roman;font-size:10pt;' >, the Company recorded no asset impairment charges.</font></p></div>
CY2017	us-gaap	Loss Contingency Undiscounted Amount Of Insurance Related Assessment Liability LossContingencyUndiscountedAmountOfInsuranceRelatedAssessmentLiability	5306000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	515000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	297000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2936000	USD
CY2017Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	40969000	USD
CY2018Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	41625000	USD
CY2018Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11035000	USD
CY2018Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	6.75
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001048268
CY2018Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	8144000	USD
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2018	dei	Entity Filer Category EntityFilerCategory	Smaller Reporting Company
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	151578000	USD
CY2018Q3	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	24312000	USD
CY2018Q3	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	31446000	USD
CY2018Q3	us-gaap	Assets Current AssetsCurrent	262693000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25364000	USD
CY2018Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	30590000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	46580000	USD
CY2018Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6065000	USD
CY2018Q3	us-gaap	Assets Assets	421994000	USD
CY2018Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	130591000	USD
CY2018Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	33826000	USD
CY2018Q3	us-gaap	Liabilities Current LiabilitiesCurrent	164417000	USD
CY2018Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4374000	USD
CY2018Q3	us-gaap	Liabilities Liabilities	198355000	USD
CY2018Q3	us-gaap	Members Equity Attributable To Noncontrolling Interest MembersEquityAttributableToNoncontrollingInterest	3232000	USD
CY2018Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q3	us-gaap	Common Stock Value CommonStockValue	220000	USD
CY2018Q3	us-gaap	Treasury Stock Value TreasuryStockValue	8937000	USD
CY2018Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	196810000	USD
CY2018Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	32314000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	220407000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	421994000	USD
CY2017Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	142946000	USD
CY2017Q3	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	21360000	USD
CY2017Q3	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	13438000	USD
CY2017Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	8795000	USD
CY2017Q3	us-gaap	Assets Current AssetsCurrent	231752000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24643000	USD
CY2017Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	31413000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	86211000	USD
CY2017Q3	us-gaap	Assets Assets	424494000	USD
CY2017Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	120710000	USD
CY2017Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	29918000	USD
CY2017Q3	us-gaap	Liabilities Current LiabilitiesCurrent	150628000	USD
CY2017Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4457000	USD
CY2017Q3	us-gaap	Liabilities Liabilities	184519000	USD
CY2017Q3	us-gaap	Members Equity Attributable To Noncontrolling Interest MembersEquityAttributableToNoncontrollingInterest	3271000	USD
CY2017Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q3	us-gaap	Common Stock Value CommonStockValue	220000	USD
CY2017Q3	us-gaap	Treasury Stock Value TreasuryStockValue	6898000	USD
CY2017Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	196955000	USD
CY2017Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	46427000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	236704000	USD
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	424494000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	354000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	172000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6899000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-98402000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	220407000	USD
CY2018	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	103000	USD
CY2016	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	652000	USD
CY2017	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	-145000	USD
CY2018Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	747000	USD
CY2018Q3	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	-564000	USD
CY2017Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	641000	USD
CY2017Q3	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	-674000	USD
CY2018Q3	us-gaap	Accrued Insurance Current And Noncurrent AccruedInsuranceCurrentAndNoncurrent	6202000	USD
CY2017Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	650000	USD
CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	868000	USD
CY2017Q3	us-gaap	Accrued Insurance Current And Noncurrent AccruedInsuranceCurrentAndNoncurrent	6204000	USD
CY2018Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	171000	USD
CY2017Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	218000	USD
CY2018Q3	iesc	Estimatedcostofcompetionofbondedproject Estimatedcostofcompetionofbondedproject	50170000	USD
CY2016	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	65000	USD
CY2018	us-gaap	Increase Decrease In Cost In Excess Of Billing On Uncompleted Contract IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract	17840000	USD
CY2018	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	3570000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-274000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3970000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	421000	USD
CY2018	us-gaap	Restricted Stock Expense RestrictedStockExpense	-136000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2250000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4563000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	108000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	7406000	USD
CY2018Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.39
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	399000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017Q3	us-gaap	Goodwill Goodwill	46693000	USD
CY2018Q3	us-gaap	Goodwill Goodwill	50702000	USD
CY2018	iesc	Estimated Earnings On Contracts In Progress EstimatedEarningsOnContractsInProgress	62617000	USD
CY2017	iesc	Estimated Earnings On Contracts In Progress EstimatedEarningsOnContractsInProgress	55606000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14157000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	13422000	USD
CY2016Q3	us-gaap	Goodwill Goodwill	39936000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	7121000	USD
CY2018Q3	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	912000	USD
CY2017Q3	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	1115000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	8516000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	2221000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	4675000	USD
CY2018Q3	us-gaap	Inventory Net InventoryNet	20966000	USD
CY2017Q3	us-gaap	Inventory Net InventoryNet	16923000	USD
CY2018Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	21205536	shares
CY2018Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	843993	shares
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	288000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-2043000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	8860000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	38151000	USD
CY2018	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	15000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	6584000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7574000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-11861000	USD
CY2018	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	168000	USD
CY2018	us-gaap	Repayments Of Debt RepaymentsOfDebt	177000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2406000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2059000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-336000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	22349000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	11000	USD
CY2017Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	712554	shares
CY2016	us-gaap	Net Income Loss NetIncomeLoss	120778000	USD
CY2018Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	22049529	shares
CY2018Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	26247000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	51952000	USD
CY2017Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	553000	USD
CY2017Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	27862000	USD
CY2016	us-gaap	Depreciation Depreciation	2727000	USD
CY2017	us-gaap	Depreciation Depreciation	3840000	USD
CY2018	us-gaap	Depreciation Depreciation	4759000	USD
CY2017Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	529000	USD
CY2018Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	631000	USD
CY2017	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	51000	USD
CY2018	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	0	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	4240000	USD
CY2018	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-231000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	9556000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	3872000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	536000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	5868000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	3146000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3417000	USD
CY2018Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	29564000	USD
CY2017Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	29434000	USD
CY2018Q3	us-gaap	Line Of Credit LineOfCredit	30247000	USD
CY2018Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	229000	USD
CY2017Q3	us-gaap	Line Of Credit LineOfCredit	30257000	USD
CY2017Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	292000	USD
CY2018	us-gaap	Loss Contingency Undiscounted Amount Of Insurance Related Assessment Liability LossContingencyUndiscountedAmountOfInsuranceRelatedAssessmentLiability	5286000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	288000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	345000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	294000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	2257	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	0	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	11000	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	33750	shares
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	42500	shares
CY2018	iesc	Reorganization Of Goodwill Excess Tax Basis ReorganizationOfGoodwillExcessTaxBasis	23735000	USD
CY2018Q3	us-gaap	Increase In Unrecognized Tax Benefits Is Reasonably Possible IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	5754000	USD
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	349000	USD
CY2017Q3	iesc	Uncertain Tax Benefit Net Opertating Loss From Goodwill UncertainTaxBenefitNetOpertatingLossFromGoodwill	50180000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	28290000	USD
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1500	shares
CY2018Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2018Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	31333000	USD
CY2016	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2017Q3	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	363000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	218000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	119722000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1056000	USD
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	212997	shares
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	13275000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	103000	USD
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	252705	shares
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	243000	USD
CY2018Q3	iesc	Uncertain Tax Benefit Net Opertating Loss From Goodwill UncertainTaxBenefitNetOpertatingLossFromGoodwill	28453000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	14000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2453	pure
CY2018Q3	us-gaap	Business Combination Contingent Consideration Liability Noncurrent BusinessCombinationContingentConsiderationLiabilityNoncurrent	680000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8000	USD
CY2015Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	207166	shares
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	140668	shares
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	11000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	-136000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2367000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2059000	USD
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	21336975	shares
CY2018Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	4760000	USD
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	153000	USD
CY2018Q3	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	1908000	USD
CY2017Q3	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	3284000	USD
CY2017Q3	us-gaap	Loss Contingency Accrual Insurance Related Assessment Discount Rate LossContingencyAccrualInsuranceRelatedAssessmentDiscountRate	0.019	pure
CY2018Q3	us-gaap	Loss Contingency Accrual Insurance Related Assessment Discount Rate LossContingencyAccrualInsuranceRelatedAssessmentDiscountRate	0.029	pure
CY2018Q3	us-gaap	Minority Interest Ownership Percentage By Noncontrolling Owners MinorityInterestOwnershipPercentageByNoncontrollingOwners	0.2	pure
CY2018Q3	us-gaap	Minority Interest Ownership Percentage By Parent MinorityInterestOwnershipPercentageByParent	0.8	pure
CY2018Q3	iesc	Controllingshareholderownershippercentage Controllingshareholderownershippercentage	0.59	pure
CY2018Q4	iesc	Boardobserverownershipthreshold Boardobserverownershipthreshold	0.2	pure
CY2018	us-gaap	Property Plant And Equipment Disposals PropertyPlantAndEquipmentDisposals	6651000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-14113000	USD
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	301879	shares
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1707000	USD
CY2017	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	448000	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2016	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2018Q3	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.0221	pure
CY2018Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	912000	USD
CY2017Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1115000	USD
CY2017Q3	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0304	pure
CY2018Q3	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0386	pure
CY2018Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	100000000	USD
CY2018Q3	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	1448000	USD
CY2017	iesc	Unrecognizedtaxbenefitsreductionsratechange Unrecognizedtaxbenefitsreductionsratechange	0	USD
CY2018	iesc	Unrecognizedtaxbenefitsreductionsratechange Unrecognizedtaxbenefitsreductionsratechange	18636000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	30256000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	35000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1895000	USD
CY2018	us-gaap	Line Of Credit Facility Covenant Terms LineOfCreditFacilityCovenantTerms	• a Fixed Charge Coverage Ratio (as defined in the Amended Credit Agreement), measured quarterly on a trailing four-quarter basis at the end of each quarter, of at least 1.1 to 1.0; and • minimum Liquidity (as defined in the Amended Credit Agreement) of at least thirty percent (30%) of the Maximum Revolver Amount (as defined in the Amended Credit Agreement), or $30,000; with, for purposes of this covenant, at least fifty percent (50%) of our Liquidity comprised of Excess Availability (as defined in the Amended Credit Agreement).
CY2018Q3	iesc	Ebitda Greater Than Or Equal To EbitdaGreaterThanOrEqualTo	35000000	USD
CY2018Q3	iesc	Excess Availability Is Greater Than Or Equal To ExcessAvailabilityIsGreaterThanOrEqualTo	30000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1157000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	737000	USD
CY2017Q3	us-gaap	Business Combination Contingent Consideration Liability Noncurrent BusinessCombinationContingentConsiderationLiabilityNoncurrent	786000	USD
CY2017	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-313000	USD
CY2018Q3	us-gaap	Loss Contingency Receivable Current LossContingencyReceivableCurrent	2500000	USD
CY2018Q3	iesc	Loss Contingency Contingent Payment LossContingencyContingentPayment	1500000	USD
CY2018	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	1895000	USD
CY2018Q3	iesc	Operatingleasenotyetcommencedcommitment Operatingleasenotyetcommencedcommitment	962000	USD
CY2017Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2018Q3	iesc	Minorityinterestredemptionvalue Minorityinterestredemptionvalue	2579000	USD
CY2017	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	44000	USD
CY2018	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-44000	USD
CY2017Q4	iesc	Percentage Of Plan Funded PercentageOfPlanFunded	0.8296	pure
CY2018Q3	us-gaap	Business Combination Acquired Receivables Gross Contractual Amount BusinessCombinationAcquiredReceivablesGrossContractualAmount	1478000	USD
CY2018	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	4965000	USD
CY2018	us-gaap	Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual	-532000	USD
CY2018Q3	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	1500000	shares

Files In Submission

Name	View Source	Status
0001193125-18-344274-index-headers.html	Edgar Link	pending
0001193125-18-344274-index.html	Edgar Link	pending
0001193125-18-344274.txt	Edgar Link	pending
0001193125-18-344274-xbrl.zip	Edgar Link	pending
d668006d10k.htm	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
g668006g27s02.jpg	Edgar Link	pending
g668006g89l67.jpg	Edgar Link	pending
iesc-20180930.xml	Edgar Link	completed
iesc-20180930.xsd	Edgar Link	pending
iesc-20180930_cal.xml	Edgar Link	unprocessable
iesc-20180930_def.xml	Edgar Link	unprocessable
iesc-20180930_lab.xml	Edgar Link	unprocessable
iesc-20180930_pre.xml	Edgar Link	unprocessable
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report.css	Edgar Link	pending
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$IESC
IES Holdings, Inc. Stock $iesc

2018 Form 10-K Financial Statement

#000119312518344274 Filed on December 07, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IESC IES Holdings, Inc. Stock $iesc

2018 Form 10-K Financial Statement

#000119312518344274 Filed on December 07, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IESC
IES Holdings, Inc. Stock $iesc