Note 11 - 401(k) Plan (Details Textual)	12 Months Ended
Jun. 30, 2016
Defined Contribution Pension and Other Postretirement Plans Minimum Age	21 years

The minimum age required for participation in the Company's 401(k) Plan.

No definition available.

Name:	bnet_DefinedContributionPensionAndOtherPostretirementPlansMinimumAge
Namespace Prefix:	bnet_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration