Note 10 - Significant Concentrations - Rebate Credits (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Cost of Sales [Member]
Reductions	$ 106	$ 113
Selling and Marketing Expense [Member]
Reductions	$ 57	$ 219

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