Cover - shares	6 Months Ended
	Dec. 31, 2021	Feb. 01, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	Q2
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
Title of 12(b) Security	Common Stock
Trading Symbol	BNET
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 Common Stock, Shares Outstanding		43,209,511