Note 2 - Basis of Presentation (Details Textual) $ in Millions	Dec. 31, 2015 USD ($)
New Accounting Pronouncement, Early Adoption, Effect [Member]
Offset of Deferred Tax Assets and Liabilities	$ 0.5

Represents the amount of the offset of deferred tax assets and liabilities from the balance sheet.

No definition available.

Name:	bota_OffsetOfDeferredTaxAssetsAndLiabilities
Namespace Prefix:	bota_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant