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Note 7 - Summary of MSU Activity (Details) (Restricted Stock and Market Stock Units [Member], USD $)
6 Months Ended
Dec. 31, 2014
Restricted Stock and Market Stock Units [Member]
 
Balance at June 30, 2014 (in shares) 261,447us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember
Balance at June 30, 2014 (in dollars per share) $ 3.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember
Awarded (in shares) 40,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember
Awarded (in dollars per share) $ 2.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember
Forfeited (in shares) (38,152)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember
Forfeited (in dollars per share) $ 4.02us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember
Balance at December 31, 2014 (in shares) 263,295us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember
Balance at December 31, 2014 (in dollars per share) $ 3.74us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= bota_RestrictedStockAndMarketStockUnitsMember