Note 9 - Related Party Transactions (Details Textual) - USD ($)	3 Months Ended	12 Months Ended	15 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2018
Stock Issued During Period, Value, Issued for Services	$ 10,952
Coalition for Affordable Bay Solutions [Member]
Related Party Transaction, Expenses from Transactions with Related Party			$ 165,650
Related Party Transaction, Contributions			$ 68,900
Stock Issued During Period, Shares, Issued for Services	16,000		129,000
Stock Issued During Period, Value, Issued for Services	$ 8,000		$ 96,750
Related Party Transaction, Reimbursements	$ 30,000	$ 0		$ 41,000

The amount of contributions to a related party.

No definition available.

Name:	bnet_RelatedPartyTransactionContributions
Namespace Prefix:	bnet_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodValueIssuedForServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bnet_CoalitionForAffordableBaySolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: