Note 10 - Related Party Transactions (Details Textual) - Coalition for Affordable Bay Solutions [Member] - USD ($)	3 Months Ended	9 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Related Party Transaction, Reimbursements	$ 0	$ 0	$ 0	$ 0
Payments for Consulting Expenses	$ 0	$ 12,720	$ 0	$ 52,540

The amount of reimbursements received from a related party for prior contributions.

No definition available.

Name:	bnet_RelatedPartyTransactionReimbursements
Namespace Prefix:	bnet_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration