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Note 8 - Reconciliation of the Beginning and Ending Balances of the Restructuring Liability: (Details) (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Jun. 30, 2014
Severance and employment costs $ 700,000us-gaap_RestructuringReserve $ 700,000us-gaap_RestructuringReserve $ 2,000,000us-gaap_RestructuringReserve
Severance and employment costs (300,000)us-gaap_PaymentsForRestructuring (1,600,000)us-gaap_PaymentsForRestructuring  
Other charges related to office closure   300,000us-gaap_RestructuringCharges  
Employee Severance [Member]      
Severance and employment costs 400,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
400,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
2,000,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Severance and employment costs   (1,600,000)us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
 
Other Charges Related to Office Closure [Member]      
Severance and employment costs 300,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= bota_OtherChargesRelatedoOfficeClosureMember
300,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= bota_OtherChargesRelatedoOfficeClosureMember
0us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= bota_OtherChargesRelatedoOfficeClosureMember
Other charges related to office closure   $ 300,000us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= bota_OtherChargesRelatedoOfficeClosureMember