Note 13 - Significant Concentrations - Rebate Credits (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Cost of Sales [Member]
Reductions	$ 757	$ 314
Selling and Marketing Expense [Member]
Reductions	$ 1,115	$ 1,217

The amount of expense offset under the rebates program.

No definition available.

Name:	bsqr_ExpenseOffsetUnderRebatesProgram
Namespace Prefix:	bsqr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration