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Note 6 - Loan Payable (Details) (USD $)
6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2013
Jun. 30, 2013
Sep. 25, 2014
Note 6 - Loan Payable (Details) [Line Items]            
Construction Loan 7,800,000us-gaap_ConstructionLoan $ 7,800,000us-gaap_ConstructionLoan        
Subsequent Event [Member] | PA-1 [Member]            
Note 6 - Loan Payable (Details) [Line Items]            
Debt Instrument, Debt Default, Amount           8,137,117us-gaap_DebtDefaultLongtermDebtAmount
/ dei_LegalEntityAxis
= bnet_PA1Member
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Interest Only Payments, Number of Years [Member] | Pennvest Loan [Member]            
Note 6 - Loan Payable (Details) [Line Items]            
Term Loan Payment Term 3 years          
Years 1 through 5 [Member] | Pennvest Loan [Member]            
Note 6 - Loan Payable (Details) [Line Items]            
Debt Instrument, Interest Rate During Period 2.547%us-gaap_DebtInstrumentInterestRateDuringPeriod
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
/ us-gaap_StatementScenarioAxis
= bnet_YearsOneThroughFiveMember
         
Years 6 through Maturity [Member] | Pennvest Loan [Member]            
Note 6 - Loan Payable (Details) [Line Items]            
Debt Instrument, Interest Rate During Period 3.184%us-gaap_DebtInstrumentInterestRateDuringPeriod
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
/ us-gaap_StatementScenarioAxis
= bnet_YearsSixThroughMaturityMember
         
Pennvest Loan [Member]            
Note 6 - Loan Payable (Details) [Line Items]            
Construction Loan 7,754,000us-gaap_ConstructionLoan
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
7,754,000us-gaap_ConstructionLoan
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
       
Line of Credit Facility, Maximum Borrowing Capacity 7,754,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
7,754,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
       
Repayments of Long-term Debt         574,000us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
 
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 704,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
704,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
       
Long-term Debt, Maturities, Repayments of Principal in Year Two 723,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
723,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
       
Long-term Debt, Maturities, Repayments of Principal in Year Three 741,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
741,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
       
Long-term Debt, Maturities, Repayments of Principal in Year Four 760,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
760,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
       
Long-term Debt, Maturities, Repayments of Principal after Year Four 4,252,000bnet_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
4,252,000bnet_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
       
Interest Expense, Debt 98,747us-gaap_InterestExpenseDebt
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
49,373us-gaap_InterestExpenseDebt
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
49,374us-gaap_InterestExpenseDebt
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
98,748us-gaap_InterestExpenseDebt
/ us-gaap_DebtInstrumentAxis
= bnet_PennvestLoanMember
   
PA-1 [Member]            
Note 6 - Loan Payable (Details) [Line Items]            
Debt Instrument, Debt Default, Amount           $ 8,137,117us-gaap_DebtDefaultLongtermDebtAmount
/ dei_LegalEntityAxis
= bnet_PA1Member