| Cover | Jun. 27, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 27, 2024 |
| Entity File Number | 000-19333 |
| Entity Registrant Name | BION ENVIRONMENTAL TECHNOLOGIES, INC. |
| Entity Central Index Key | 0000875729 |
| Entity Tax Identification Number | 84-1176672 |
| Entity Incorporation, State or Country Code | CO |
| Entity Address, Address Line One | 9 East Park Court |
| Entity Address, City or Town | Old Bethpage |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 11804 |
| City Area Code | 516 |
| Local Phone Number | 586-5643 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
