Note 10 - Significant Risk Concentrations - Rebate Credits (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cost of Sales [Member]
Reductions	$ 103	$ 41	$ 209	$ 154
Selling and Marketing Expense [Member]
Reductions	$ 120	$ 721	$ 177	$ 940

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