Subsequent Event (Details) $ in Millions	Jul. 31, 2015 USD ($)
Subsequent Event [Member]
Subsequent Event (Details) [Line Items]
Sale of Restricted Stock, Maximum Amount to be Raised	$ 3.0

The maximum amount to be raised through sale of restricted stock.

No definition available.

Name:	bmra_SaleOfRestrictedStockMaximumAmountToBeRaised
Namespace Prefix:	bmra_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant