XML 17 R1.htm IDEA: XBRL DOCUMENT v3.23.3
DEI Document - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2023
Nov. 30, 2023
Mar. 31, 2023
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date --09-30    
Document Period End Date Sep. 30, 2023    
Document Transition Report false    
Entity File Number 001-13783    
Entity Registrant Name IES Holdings, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 76-0542208    
Entity Address, Address Line One 2 Riverway    
Entity Address, Address Line Two Suite 1730    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77056    
City Area Code 713    
Local Phone Number 860-1500    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol IESC    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 356,900
Entity Common Stock, Shares Outstanding   20,194,218  
Documents Incorporated by Reference
Certain information contained in the Proxy Statement for the 2024 Annual Meeting of Stockholders of the Registrant to be held on February 22, 2024, is incorporated by reference into Part III of this Annual Report on Form 10-K.
    
Entity Central Index Key 0001048268    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Document Financial Statement Error Correction [Flag] false