$IESC
IES Holdings, Inc. Stock $iesc

$iesc Overview Financials Valuation SEC Filings Company Website

2016 Q3 Form 10-K Financial Statement

#000119312517364439 Filed on December 08, 2017

Income Statement

Concept	2016 Q3	2016 Q2	2016 Q1
Revenue	$205.6M	$179.6M	$160.0M
YoY Change	28.78%	24.65%	19.61%
Cost Of Revenue	$168.1M	$145.6M	$132.2M
YoY Change	30.01%	22.35%	17.99%
Gross Profit	$37.54M	$34.00M	$27.81M
YoY Change	23.37%	35.71%	28.12%
Gross Profit Margin	18.25%	18.93%	17.38%
Selling, General & Admin	$28.10M	$25.70M	$24.30M
YoY Change	23.25%	25.37%	25.2%
% of Gross Profit	74.86%	75.59%	87.37%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.160M	$1.656M	$1.031M
YoY Change	208.57%	160.38%	75.04%
% of Gross Profit	5.75%	4.87%	3.71%
Operating Expenses	$28.40M	$25.80M	$24.50M
YoY Change	25.11%	25.85%	26.23%
Operating Profit	$9.138M	$8.197M	$3.312M
YoY Change	18.26%	80.07%	44.13%
Interest Expense	-$400.0K	-$300.0K	-$300.0K
YoY Change	33.33%	0.0%	-196.46%
% of Operating Profit	-4.38%	-3.66%	-9.06%
Other Income/Expense, Net	$0.00	$0.00	$0.00
YoY Change			-100.0%
Pretax Income	$8.800M	$7.900M	$2.200M
YoY Change	20.55%	83.72%	1.95%
Income Tax	-$93.20M	-$2.937M	$10.00K
% Of Pretax Income	-1059.09%	-37.18%	0.45%
Net Earnings	$102.0M	$10.81M	$2.194M
YoY Change	1263.55%	173.06%	21.22%
Net Earnings / Revenue	49.59%	6.02%	1.37%
Basic Earnings Per Share	$4.75	$0.50	$0.10
Diluted Earnings Per Share	$4.74	$0.50	$0.10
COMMON SHARES
Basic Shares Outstanding	21.45M shares	21.30M shares	21.27M shares
Diluted Shares Outstanding		21.46M shares	21.44M shares

Balance Sheet

Concept	2016 Q3	2016 Q2	2016 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$33.00M	$22.80M	$58.30M
YoY Change	-33.2%	-49.11%	23.26%
Cash & Equivalents	$32.96M	$22.81M	$58.27M
Short-Term Investments
Other Short-Term Assets	$3.500M	$4.600M	$7.400M
YoY Change	16.67%	4.55%	48.0%
Inventory	$13.24M	$17.40M	$12.70M
Prepaid Expenses
Receivables	$124.4M	$140.0M	$114.9M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$209.7M	$184.8M	$193.2M
YoY Change	10.94%	5.6%	15.1%
LONG-TERM ASSETS
Property, Plant & Equipment	$15.69M	$15.30M	$11.60M
YoY Change	34.33%	28.57%	7.56%
Goodwill	$39.94M
YoY Change	131.53%
Intangibles	$31.72M
YoY Change	571.67%
Long-Term Investments
YoY Change
Other Assets	$3.710M	$4.900M	$4.400M
YoY Change	24.33%	16.67%	5.39%
Total Long-Term Assets	$184.6M	$92.72M	$42.58M
YoY Change	403.87%	147.22%	28.04%
TOTAL ASSETS
Total Short-Term Assets	$209.7M	$184.8M	$193.2M
Total Long-Term Assets	$184.6M	$92.72M	$42.58M
Total Assets	$394.3M	$277.5M	$235.8M
YoY Change	74.73%	30.6%	17.24%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$108.8M	$90.70M	$82.50M
YoY Change	31.24%	22.07%	10.59%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$0.00	$0.00
YoY Change	-100.0%
Total Short-Term Liabilities	$133.1M	$118.4M	$108.8M
YoY Change	23.11%	17.11%	15.9%
LONG-TERM LIABILITIES
Long-Term Debt	$29.26M	$30.20M	$10.20M
YoY Change	217.91%	196.08%	-0.24%
Other Long-Term Liabilities	$6.832M	$6.800M	$6.900M
YoY Change	-2.16%	-4.23%	-3.25%
Total Long-Term Liabilities	$36.09M	$37.00M	$17.10M
YoY Change	122.96%	113.87%	-1.48%
TOTAL LIABILITIES
Total Short-Term Liabilities	$133.1M	$118.4M	$108.8M
Total Long-Term Liabilities	$36.09M	$37.00M	$17.10M
Total Liabilities	$169.1M	$157.1M	$126.0M
YoY Change	36.11%	32.69%	13.28%
SHAREHOLDERS EQUITY
Retained Earnings	$32.75M
YoY Change	-137.2%
Common Stock	$220.0K
YoY Change	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$4.781M
YoY Change	8.63%
Treasury Stock Shares	593.0K shares	608.9K shares
Shareholders Equity	$223.4M	$120.4M	$109.8M
YoY Change
Total Liabilities & Shareholders Equity	$394.3M	$277.5M	$235.8M
YoY Change	74.73%	30.59%	17.25%

Cashflow Statement

Concept	2016 Q3	2016 Q2	2016 Q1
OPERATING ACTIVITIES
Net Income	$102.0M	$10.81M	$2.194M
YoY Change	1263.55%	173.06%	21.22%
Depreciation, Depletion And Amortization	$2.160M	$1.656M	$1.031M
YoY Change	208.57%	160.38%	75.04%
Cash From Operating Activities	$11.07M	-$4.420M	$13.41M
YoY Change	108.87%	-400.68%	191.52%
INVESTING ACTIVITIES
Capital Expenditures	-$1.260M	-$1.080M	-$730.0K
YoY Change	223.08%	42.11%	-21.51%
Acquisitions
YoY Change
Other Investing Activities	$180.0K	-$49.19M	-$770.0K
YoY Change		1481.67%
Cash From Investing Activities	-$1.090M	-$50.26M	-$1.500M
YoY Change	179.49%	1198.71%	61.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	430.0K	19.22M	50.00K
YoY Change	-219.44%	-48150.0%	-101.61%
NET CHANGE
Cash From Operating Activities	11.07M	-4.420M	13.41M
Cash From Investing Activities	-1.090M	-50.26M	-1.500M
Cash From Financing Activities	430.0K	19.22M	50.00K
Net Change In Cash	10.41M	-35.46M	11.96M
YoY Change	128.79%	1353.28%	1998.25%
FREE CASH FLOW
Cash From Operating Activities	$11.07M	-$4.420M	$13.41M
Capital Expenditures	-$1.260M	-$1.080M	-$730.0K
Free Cash Flow	$12.33M	-$3.340M	$14.14M
YoY Change	116.7%	-249.78%	155.7%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	20000000	USD
CY2017Q3	us-gaap	Treasury Stock Value TreasuryStockValue	6898000	USD
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.75
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.74
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.1
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.1
CY2017Q3	iesc	Deferredcompensationarrangementwithindividualsmaximumpercentage Deferredcompensationarrangementwithindividualsmaximumpercentage	0.75	pure
CY2017Q3	iesc	Defined Benefit Plan Percentage Vest After Ten Years Of Service DefinedBenefitPlanPercentageVestAfterTenYearsOfService	0.5	pure
CY2017Q3	iesc	Denfied Benefits Plan Annual Percentage Vested DenfiedBenefitsPlanAnnualPercentageVested	0.1	pure
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	31409	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	0	shares
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	140668	shares
CY2015Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	207166	shares
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	174334	shares
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
CY2017Q3	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	45750	shares
CY2017Q3	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	45750	shares
CY2016Q3	iesc	Percentage Of Plan Funded PercentageOfPlanFunded	0.8282	pure
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	25332	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	44500	shares
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	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 Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0
CY2014Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	5.46
CY2015Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	5.79
CY2017Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	6.42
CY2017Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	21337245	shares
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2014Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	87972000	USD
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
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	360000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	345000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5664000	USD
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 Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1716000	USD
CY2016	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	1500000	USD
CY2016	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-936000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	22349000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3417000	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	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-60736000	USD
CY2016	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	20289000	USD
CY2016	us-gaap	Repayments Of Debt RepaymentsOfDebt	290000	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
CY2016Q1	us-gaap	Revenues Revenues	159981000	USD
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CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	5.76
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	316000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2509000	USD
CY2015	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-67000	USD
CY2015	us-gaap	Restricted Stock Expense RestrictedStockExpense	524000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	15115000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-2526000	USD
CY2015	us-gaap	Increase Decrease In Cost In Excess Of Billing On Uncompleted Contract IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract	3727000	USD
CY2015	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-120000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	6654000	USD
CY2015	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	3313000	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3113000	USD
CY2015	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	26000	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
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	1415000	USD
CY2015	us-gaap	Interest Paid InterestPaid	792000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	1532000	USD
CY2017Q3	iesc	Estimatedundiscountedultimatelossesinnexttwelvemonths Estimatedundiscountedultimatelossesinnexttwelvemonths	1888000	USD
CY2017Q3	iesc	Estimatedundiscountedultimatelossesinyeartwo Estimatedundiscountedultimatelossesinyeartwo	1124000	USD
CY2017Q3	iesc	Estimatedundiscountedultimatelossesinyearthree Estimatedundiscountedultimatelossesinyearthree	778000	USD
CY2017Q3	iesc	Estimatedundiscountedultimatelossesinyearfour Estimatedundiscountedultimatelossesinyearfour	416000	USD
CY2017Q3	iesc	Estimatedundiscountedultimatelossesinyearfive Estimatedundiscountedultimatelossesinyearfive	193000	USD
CY2017Q3	iesc	Estimatedundiscountedultimatelossesthereafter Estimatedundiscountedultimatelossesthereafter	907000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	51952000	USD
CY2017Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	553000	USD
CY2017	iesc	Continuingnetincomelossavailabletocommonstockholdersbasic Continuingnetincomelossavailabletocommonstockholdersbasic	13275000	USD
CY2017	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	13422000	USD
CY2017	iesc	Discontinuednetincomelossavailabletocommonstockholdersbasic Discontinuednetincomelossavailabletocommonstockholdersbasic	0	USD
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	13275000	USD
CY2016	iesc	Continuingnetincomelossavailabletocommonstockholdersbasic Continuingnetincomelossavailabletocommonstockholdersbasic	119722000	USD
CY2015	iesc	Continuingnetincomelossavailabletocommonstockholdersbasic Continuingnetincomelossavailabletocommonstockholdersbasic	16792000	USD
CY2016	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	120778000	USD
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CY2015	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	16877000	USD
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CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-339000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16453000	USD
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	119722000	USD
CY2016	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	360000	USD
CY2016	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	466000	USD
CY2017Q3	us-gaap	Accounts Payable Trade Current And Noncurrent AccountsPayableTradeCurrentAndNoncurrent	63246000	USD
CY2017Q3	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	33561000	USD
CY2017Q3	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	17699000	USD
CY2016Q3	us-gaap	Accounts Payable Trade Current And Noncurrent AccountsPayableTradeCurrentAndNoncurrent	64963000	USD
CY2016Q3	us-gaap	Accrued Employee Benefits Current And Noncurrent AccruedEmployeeBenefitsCurrentAndNoncurrent	26827000	USD
CY2016Q3	us-gaap	Other Accrued Liabilities Current And Noncurrent OtherAccruedLiabilitiesCurrentAndNoncurrent	11568000	USD
CY2017Q3	iesc	Billings To Date BillingsToDate	-559036000	USD
CY2017Q3	iesc	Contracts In Process Net ContractsInProcessNet	-16480000	USD
CY2016Q3	iesc	Billings To Date BillingsToDate	-466368000	USD
CY2016Q3	iesc	Contracts In Process Net ContractsInProcessNet	-8675000	USD
CY2017Q3	iesc	Contracts In Process Net From Balance Sheet ContractsInProcessNetFromBalanceSheet	-16480000	USD
CY2016Q3	iesc	Contracts In Process Net From Balance Sheet ContractsInProcessNetFromBalanceSheet	-8675000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-564000	USD
CY2017Q3	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	0	USD
CY2016	us-gaap	Gross Profit GrossProfit	126980000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23761000	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
CY2016Q3	iesc	Deferredtaxassetsnoncurrent1 Deferredtaxassetsnoncurrent1	0	USD
CY2016Q3	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	599000	USD
CY2016Q3	us-gaap	Investments Investments	919000	USD
CY2016Q3	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	2192000	USD
CY2017Q3	us-gaap	Cost Method Investments CostMethodInvestments	558000	USD
CY2017Q3	us-gaap	Cost Method Investments Fair Value Disclosure CostMethodInvestmentsFairValueDisclosure	729000	USD
CY2016Q3	us-gaap	Cost Method Investments Fair Value Disclosure CostMethodInvestmentsFairValueDisclosure	1078000	USD
CY2017	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	171000	USD
CY2016	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	159000	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
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	417000	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
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	729000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	79000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6582000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	280000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	10729000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	86280000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1410000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Investments DeferredTaxAssetsInvestments	84000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1012000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	338000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3185000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	103318000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	101094000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	93549000	USD
CY2016Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	55867000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	51968000	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 Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	4589000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3417000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	3867000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	3252000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	3167000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	2865000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2795000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	15467000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	31413000	USD
CY2017Q3	us-gaap	Revenues Revenues	206581000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	38104000	USD
CY2016Q4	us-gaap	Revenues Revenues	192178000	USD
CY2017Q1	us-gaap	Revenues Revenues	203662000	USD
CY2017Q2	us-gaap	Revenues Revenues	208323000	USD
CY2016Q4	us-gaap	Gross Profit GrossProfit	35182000	USD
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	252705	shares
CY2017Q1	us-gaap	Gross Profit GrossProfit	31814000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	35398000	USD
CY2015Q4	us-gaap	Revenues Revenues	150766000	USD
CY2016Q2	us-gaap	Revenues Revenues	179599000	USD
CY2016Q3	us-gaap	Revenues Revenues	205647000	USD
CY2015Q4	us-gaap	Gross Profit GrossProfit	27633000	USD
CY2016Q1	us-gaap	Gross Profit GrossProfit	27812000	USD
CY2016Q2	us-gaap	Gross Profit GrossProfit	33997000	USD
CY2016Q3	us-gaap	Gross Profit GrossProfit	37538000	USD
CY2015Q4	us-gaap	Profit Loss ProfitLoss	5799000	USD
CY2016Q1	us-gaap	Profit Loss ProfitLoss	2194000	USD
CY2016Q2	us-gaap	Profit Loss ProfitLoss	10805000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	101980000	USD
CY2017Q3	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	815000	USD
CY2016Q3	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	875000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	6990000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	5868000	USD
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	5295000	USD
CY2017Q1	dei	Entity Public Float EntityPublicFloat	152766118	USD
CY2015Q3	us-gaap	Assets Assets	225679000	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 Authorized CommonStockSharesAuthorized	100000000	shares
CY2017Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	22049529	shares
CY2016Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2016Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2016Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2016Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2016Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	22049529	shares
CY2017	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.62
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2017	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.62
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2015	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.79
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2015	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.79
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.02
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.77
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21480622	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21526188	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21280549	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21533254	shares
CY2015	us-gaap	Revenues Revenues	573857000	USD
CY2015	us-gaap	Cost Of Services CostOfServices	473966000	USD
CY2015	us-gaap	Gross Profit GrossProfit	99891000	USD
CY2015	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	81416000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	13000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	18488000	USD
CY2015	us-gaap	Interest Expense InterestExpense	1130000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	9556000	USD
CY2015	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	180000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	17538000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	661000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	16877000	USD
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-339000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	16538000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16540000	USD
CY2017	us-gaap	Revenues Revenues	810744000	USD
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	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	13594000	USD
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2017	us-gaap	Profit Loss ProfitLoss	13594000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	13422000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	590000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1583000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	19676000	USD
CY2016	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-16000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	220000	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	269000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1902000	USD
CY2015	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-586000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2779000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	11506000	USD
CY2015	us-gaap	Repayments Of Debt RepaymentsOfDebt	0	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3622000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3596000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	2018000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5892000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	590000	USD
CY2017Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	27862000	USD
CY2017	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 accountin</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >g principles generally accepted</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > in the United States of America</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;' >(“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>
CY2017	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 </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >large public companies, </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >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,</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > within the construction</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;' > homebuilding </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >and mission critical facility </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >market</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >s</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >. However, we are entitled to payment for work performed and </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >generally </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >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</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;' > We periodically assess the financ</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >ial condition of these institutions where these funds are held and believe the credit risk is minimal</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;' >W</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >e maintain the majority of our cash and cash equivalents in money market mutual funds.</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;' >There can be no assurance, however, that we will not be adversel</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >y 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 </font><font style='font-family:Times New Roman;font-size:10pt;background-color:#FFFF00;color:#000000;' >10%</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' > of our </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >consolidated </font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >revenues for the years ended </font><font style='font-family:Times New Roman;font-size:10pt;background-color:#00FF00;color:#000000;' >September 30, 2017</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >, </font><font style='font-family:Times New Roman;font-size:10pt;background-color:#00FF00;color:#000000;' >2016</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;background-color:#00FF00;color:#000000;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >.</font></p></div>
CY2016Q3	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	0	USD
CY2017	iesc	Number Of Single Customers Comprising More Than Ten Percent Of Consolidated Net Sales NumberOfSingleCustomersComprisingMoreThanTenPercentOfConsolidatedNetSales	0	pure
CY2017Q3	us-gaap	Loss Contingency Accrual Insurance Related Assessment Discount Rate LossContingencyAccrualInsuranceRelatedAssessmentDiscountRate	0.019	pure
CY2016Q3	us-gaap	Loss Contingency Accrual Insurance Related Assessment Discount Rate LossContingencyAccrualInsuranceRelatedAssessmentDiscountRate	0.011	pure
CY2015	iesc	Continuingnetincomelossavailabletocommonstockholdersdiluted Continuingnetincomelossavailabletocommonstockholdersdiluted	85000	USD
CY2016	iesc	Continuingnetincomelossavailabletocommonstockholdersdiluted Continuingnetincomelossavailabletocommonstockholdersdiluted	1056000	USD
CY2017	iesc	Continuingnetincomelossavailabletocommonstockholdersdiluted Continuingnetincomelossavailabletocommonstockholdersdiluted	103000	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	212997	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	45566	shares
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	103000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1056000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	85000	USD
CY2016Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	2538000	USD
CY2016Q3	us-gaap	Inventory Work In Process InventoryWorkInProcess	4158000	USD
CY2016Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	1558000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5766000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2936000	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
CY2016Q3	us-gaap	Other Inventory OtherInventory	4982000	USD
CY2017	iesc	Costs Incurred Contract In Progress CostsIncurredContractInProgress	486950000	USD
CY2017	iesc	Estimated Profit On Contract In Progress EstimatedProfitOnContractInProgress	542556000	USD
CY2016	iesc	Costs Incurred Contract In Progress CostsIncurredContractInProgress	409075000	USD
CY2016	iesc	Estimated Profit On Contract In Progress EstimatedProfitOnContractInProgress	457693000	USD
CY2016Q3	us-gaap	Cost Method Investments CostMethodInvestments	919000	USD
CY2015Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	842000	USD
CY2017Q3	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	6493000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	243000	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
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
CY2017Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2366000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2224000	USD
CY2016Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1517000	USD
CY2016Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	5629000	USD
CY2016Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	399000	USD
CY2016Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7545000	USD
CY2015Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	55963000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	27000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3707000	USD
CY2017Q3	iesc	Deferredtaxassetsnoncurrent1 Deferredtaxassetsnoncurrent1	0	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8316000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6139000	USD
CY2016Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3710000	USD
CY2016Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	108822000	USD
CY2016Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	24229000	USD
CY2016Q3	us-gaap	Liabilities Current LiabilitiesCurrent	133051000	USD
CY2016Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2016Q3	us-gaap	Common Stock Value CommonStockValue	220000	USD
CY2016Q3	us-gaap	Treasury Stock Value TreasuryStockValue	4781000	USD
CY2016Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	195221000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-09-30
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	3.87
CY2015	iesc	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Options Term ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskOptionsTerm	P10Y
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2015	iesc	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Forfeiture Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskForfeitureRate	0.1	pure
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
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 Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.43
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	79500	shares
CY2014Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	170000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	37000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
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
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	194000	shares
CY2017	dei	Trading Symbol TradingSymbol	IESC
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21279342	shares
CY2016	us-gaap	Cost Of Services CostOfServices	569013000	USD
CY2016	us-gaap	Revenues Revenues	695993000	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 Tax Expense Benefit IncomeTaxExpenseBenefit	-97117000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	120878000	USD
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2016	us-gaap	Profit Loss ProfitLoss	120878000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	120778000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.63
CY2016	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.62
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.63
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.62
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2016	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21492339	shares
CY2015	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	524000	USD
CY2017Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	196955000	USD
CY2017	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:52.5pt;text-align:left;vertical-align:bottom;border-color:Black;min-width:52.5pt;' ><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;' >2018</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:52.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:52.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >1,888</font></td></tr><tr style='height:13.5pt;' ><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:52.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:52.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >1,124</font></td></tr><tr style='height:13.5pt;' ><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:52.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:52.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >778</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:52.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:52.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >416</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:1pt;color:#000000;' ></font></td><td style='width:9.75pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:9.75pt;' ><font style='font-family:Times New Roman;font-size:1pt;color:#000000;' ></font></td><td style='width:52.5pt;text-align:right;vertical-align:bottom;border-color:Black;min-width:52.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >193</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:52.5pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;vertical-align:bottom;border-color:Black;min-width:52.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >907</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:52.5pt;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:52.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >5,306</font></td></tr></table></div>
CY2017	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 ended </font><font style='font-family:Times New Roman;font-size:10pt;background-color:#00FF00;' >September 30, 2017</font><font style='font-family:Times New Roman;font-size:10pt;' >, </font><font style='font-family:Times New Roman;font-size:10pt;background-color:#00FF00;' >2016</font><font style='font-family:Times New Roman;font-size:10pt;' > and </font><font style='font-family:Times New Roman;font-size:10pt;background-color:#00FF00;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;' >, the Company recorded no asset impairment charges.</font></p></div>
CY2016	us-gaap	Loss Contingency Undiscounted Amount Of Insurance Related Assessment Liability LossContingencyUndiscountedAmountOfInsuranceRelatedAssessmentLiability	5223000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	294000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	380000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	381000	USD
CY2016Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	35871000	USD
CY2017Q3	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	40969000	USD
CY2017Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	6.75
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum	0.5781	pure
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum	0.556	pure
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum	0.0134	pure
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum	0.0148	pure
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0001048268
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2017	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	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	Other Assets Noncurrent OtherAssetsNoncurrent	3782000	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	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
CY2016Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	260000	USD
CY2016Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	124368000	USD
CY2016Q3	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	20135000	USD
CY2016Q3	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	15554000	USD
CY2016Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	3214000	USD
CY2016Q3	us-gaap	Assets Current AssetsCurrent	209728000	USD
CY2016Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	15694000	USD
CY2016Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	31723000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	93549000	USD
CY2016Q3	us-gaap	Assets Assets	394340000	USD
CY2016Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	6832000	USD
CY2016Q3	us-gaap	Liabilities Liabilities	169140000	USD
CY2016Q3	us-gaap	Members Equity Attributable To Noncontrolling Interest MembersEquityAttributableToNoncontrollingInterest	1795000	USD
CY2016Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	32745000	USD
CY2016Q3	us-gaap	Stockholders Equity StockholdersEquity	223405000	USD
CY2016Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	394340000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	172000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	100000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-98402000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2015	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	3622000	USD
CY2017Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	236704000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	0	USD
CY2017	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	-145000	USD
CY2015	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	0	USD
CY2016	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	652000	USD
CY2017Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	641000	USD
CY2017Q3	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	-674000	USD
CY2016Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	599000	USD
CY2016Q3	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	-987000	USD
CY2017Q3	us-gaap	Accrued Insurance Current And Noncurrent AccruedInsuranceCurrentAndNoncurrent	6204000	USD
CY2016Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	736000	USD
CY2017Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	650000	USD
CY2016Q3	us-gaap	Accrued Insurance Current And Noncurrent AccruedInsuranceCurrentAndNoncurrent	5464000	USD
CY2017Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	218000	USD
CY2016Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	235000	USD
CY2017Q3	iesc	Estimatedcostofcompetionofbondedproject Estimatedcostofcompetionofbondedproject	35389000	USD
CY2016	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	65000	USD
CY2015	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	11000	USD
CY2017	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.025	pure
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.42
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	69000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	399000	USD
CY2016Q3	us-gaap	Goodwill Goodwill	39936000	USD
CY2017Q3	us-gaap	Goodwill Goodwill	46693000	USD
CY2017	iesc	Estimated Earnings On Contracts In Progress EstimatedEarningsOnContractsInProgress	55606000	USD
CY2016	iesc	Estimated Earnings On Contracts In Progress EstimatedEarningsOnContractsInProgress	48618000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	13422000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	120778000	USD
CY2015Q3	us-gaap	Goodwill Goodwill	17249000	USD
CY2016	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	23264000	USD
CY2017Q3	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	1115000	USD
CY2016Q3	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	976000	USD
CY2016Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	11000	shares
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	5868000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	3872000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	536000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	3146000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2367000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	218000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1707000	USD
CY2017Q3	us-gaap	Inventory Net InventoryNet	16923000	USD
CY2016Q3	us-gaap	Inventory Net InventoryNet	13236000	USD
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	21336975	shares
CY2017Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	712554	shares
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	294000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-4931000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9634000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6899000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6798000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4589000	USD
CY2017	us-gaap	Increase Decrease In Cost In Excess Of Billing On Uncompleted Contract IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract	-2571000	USD
CY2017	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	5898000	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
CY2016Q3	us-gaap	Line Of Credit LineOfCredit	30233000	USD
CY2017	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	69000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-2829000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	7621000	USD
CY2017	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	5434000	USD
CY2017	us-gaap	Repayments Of Debt RepaymentsOfDebt	5432000	USD
CY2017	us-gaap	Restricted Stock Expense RestrictedStockExpense	1707000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	510000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1856000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	296000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2748000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2367000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	1139000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	24968000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	218000	USD
CY2016Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	21456539	shares
CY2016Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	592990	shares
CY2015	us-gaap	Net Income Loss NetIncomeLoss	16538000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	2000	USD
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	220000	USD
CY2017Q3	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	363000	USD
CY2017Q3	iesc	Noncontrollinginterestincreasefromfairvalueadjustment Noncontrollinginterestincreasefromfairvalueadjustment	-44000	USD
CY2016Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	40821000	USD
CY2016Q3	us-gaap	Construction In Progress Gross ConstructionInProgressGross	180000	USD
CY2016Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	25307000	USD
CY2015	us-gaap	Depreciation Depreciation	2128000	USD
CY2016	us-gaap	Depreciation Depreciation	2727000	USD
CY2017	us-gaap	Depreciation Depreciation	3840000	USD
CY2017	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	0	USD
CY2016Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	486000	USD
CY2017Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	529000	USD
CY2016	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	577000	USD
CY2017	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	51000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	7121000	USD
CY2017	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-313000	USD
CY2016Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4148000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	5799000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	2194000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	10805000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	101980000	USD
CY2015	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2779000	USD
CY2017Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	29434000	USD
CY2016Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	29257000	USD
CY2017Q3	us-gaap	Line Of Credit LineOfCredit	30257000	USD
CY2017Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	292000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	294000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	316000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	345000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	7500	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	2257	shares
CY2014Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	57666	shares
CY2016Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	0	USD
CY2017	us-gaap	Loss Contingency Undiscounted Amount Of Insurance Related Assessment Liability LossContingencyUndiscountedAmountOfInsuranceRelatedAssessmentLiability	5306000	USD
CY2016Q3	iesc	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	33221000	USD
CY2017Q3	iesc	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	28290000	USD
CY2014Q3	iesc	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47342000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	74000	shares
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	42500	shares
CY2015	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2017	iesc	Reorganization Of Goodwill Excess Tax Basis ReorganizationOfGoodwillExcessTaxBasis	24012000	USD
CY2017Q3	us-gaap	Increase In Unrecognized Tax Benefits Is Reasonably Possible IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	3284000	USD
CY2017Q3	iesc	Uncertain Tax Benefit Net Opertating Loss From Goodwill UncertainTaxBenefitNetOpertatingLossFromGoodwill	50180000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	14000	USD
CY2016Q3	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	11000	USD
CY2017	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	44000	USD
CY2017	iesc	Paymentforcontingentconsiderationliabilityfinancingactivities Paymentforcontingentconsiderationliabilityfinancingactivities	448000	USD
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	153000	USD
CY2016Q3	iesc	Uncertain Tax Benefit Net Opertating Loss From Goodwill UncertainTaxBenefitNetOpertatingLossFromGoodwill	50581000	USD
CY2015Q3	iesc	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	49360000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	28290000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	32961000	USD
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	33750	shares
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	3893000	USD

Files In Submission

Name	View Source	Status
0001193125-17-364439-index-headers.html	Edgar Link	pending
0001193125-17-364439-index.html	Edgar Link	pending
0001193125-17-364439.txt	Edgar Link	pending
0001193125-17-364439-xbrl.zip	Edgar Link	pending
d506165d10k.htm	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
g506165g02k02.jpg	Edgar Link	pending
g506165g50h45.jpg	Edgar Link	pending
iesc-20170930.xml	Edgar Link	completed
iesc-20170930.xsd	Edgar Link	pending
iesc-20170930_cal.xml	Edgar Link	unprocessable
iesc-20170930_def.xml	Edgar Link	unprocessable
iesc-20170930_lab.xml	Edgar Link	unprocessable
iesc-20170930_pre.xml	Edgar Link	unprocessable
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$IESC
IES Holdings, Inc. Stock $iesc

2016 Q3 Form 10-K Financial Statement

#000119312517364439 Filed on December 08, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IESC IES Holdings, Inc. Stock $iesc

2016 Q3 Form 10-K Financial Statement

#000119312517364439 Filed on December 08, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IESC
IES Holdings, Inc. Stock $iesc