Accounts payable and Accrued Liabilities - Additional Information (Detail)	12 Months Ended
Dec. 31, 2016 Vendor
Payables and Accruals [Abstract]
Number of vendors	2
Percentage of amount due to major vendors accounts payable	28.00%

Amount due to major vendors percentage of accounts payable.

No definition available.

Name:	bdsi_AmountDueToMajorVendorsPercentageOfAccountsPayable
Namespace Prefix:	bdsi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant