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Document And Entity Information - shares
 9 Months Ended
Jun. 30, 2015
Aug. 05, 2015
Document And Entity Information [Abstract]    
Entity Registrant Name Integrated Electrical Services, Inc.  
Entity Central Index Key 0001048268  
Document Type 10-Q  
Document Period End Date Jun. 30, 2015  
Amendment Flag false  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --09-30  
Entity Filer Category Smaller Reporting Company  
Entity Common Stock, Shares Outstanding   21,515,216
Entity Well-known Seasoned Issuer No  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
TradingSymbol IESC