Note 10 - Related Party Transactions (Details Textual) - Coalition for Affordable Bay Solutions [Member] - USD ($)	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Related Party Transaction, Reimbursements	$ 0	$ 0
Payments for Consulting Expenses	$ 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