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Cover - USD ($)
 12 Months Ended
Sep. 30, 2023
Nov. 30, 2023
Mar. 31, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Sep. 30, 2023    
Current Fiscal Year End Date --09-30    
Document Transition Report false    
Entity File Number 000-23357    
Entity Registrant Name INOTIV, INC.    
Entity Tax Identification Number 35-1345024    
Entity Address, Address Line One 2701 KENT AVENUE    
Entity Address, City or Town WEST LAFAYETTE    
Entity Incorporation, State or Country Code IN    
Entity Address, State or Province IN    
Entity Address, Postal Zip Code 47906    
City Area Code 765    
Local Phone Number 463-4527    
Title of 12(b) Security Common Shares    
Trading Symbol NOTV    
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 true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 99,902,765
Entity Common Stock, Shares Outstanding   25,790,760  
Documents Incorporated by Reference
Portions of the registrant’s definitive Proxy Statement for its 2024 Annual Meeting of Shareholders, which will be filed with the Securities and Exchange Commission (SEC) not later than 120 days after September 30, 2023, are incorporated by reference into Part III of this Annual Report on Form 10-K. With the exception of the portions of the 2024 Proxy Statement expressly incorporated into this Annual Report on Form 10-K by reference, such document shall not be deemed filed as part of this Form 10-K.
    
Entity Central Index Key 0000720154    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false