| Document and Entity Information | Apr. 30, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K/A |
| Document Period End Date | Apr. 30, 2021 |
| Entity File Number | 0-23357 |
| Entity Registrant Name | INOTIV, INC. |
| Entity Incorporation, State or Country Code | IN |
| Entity Tax Identification Number | 35-1345024 |
| Entity Address State Or Province | IN |
| Entity Address, Address Line One | 2701 Kent Avenue |
| Entity Address, City or Town | West Lafayette |
| Entity Address, Postal Zip Code | 47906-1382 |
| City Area Code | 765 |
| Local Phone Number | 463-4527 |
| Title of 12(b) Security | Common Shares |
| Trading Symbol | NOTV |
| Security Exchange Name | NASDAQ |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000720154 |
| Amendment Flag | false |
