Cover - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Aug. 01, 2022
Cover [Abstract]
Document Type	10-K/A
Amendment Flag	true
Amendment Description	Amendment No 1
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--06-30
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
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float	$ 35,500
Entity Common Stock, Shares Outstanding		43,416,011
Auditor Name	Eide Bailly LLP
Auditor Location	Colorado
Auditor Firm ID	286