Note 2 - Revenue Recognition - Significant Changes in Contract Assets and Deferred Revenue (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)
Revenue recognized that was included in deferred revenue at December 31, 2020	$ 755,595

Amount of revenue recognized during period including amounts previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.)

No definition available.

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