XML 54 R39.htm IDEA: XBRL DOCUMENT
v3.21.1

Organization and Significant Accounting Policies - Schedule of Earn-out Payable Rollforward (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Balance | $ 387 | $ 410
Amount paid | 268 | 23
Balance | $ 119 | $ 387

X
- Definition Earn out payable current. + References No definition available. + Details
Name: | BOXL_EarnOutPayableCurrent
Namespace Prefix: | BOXL_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount paid for earnout. + References No definition available. + Details
Name: | BOXL_PaymentsForEarnOutAmount
Namespace Prefix: | BOXL_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration