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Note 1 - Company Overview (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Mar. 31, 2011
Contracts Revenue $ 0.1us-gaap_ContractsRevenue $ 0.2us-gaap_ContractsRevenue  
BARDA [Member]      
Contracts Revenue     $ 231.0us-gaap_ContractsRevenue
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= bota_BARDAMember