XML 60 R47.htm IDEA: XBRL DOCUMENT
v3.19.1

Acquisitions - Schedule of Adjusted Pro Forma Expenses (Details) | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($)
Business Combinations [Abstract] |
Record amortization expense of intangible assets acquired | $ 100,000

X
- Definition Amortization expense of intangible assets acquired. + References No definition available. + Details
Name: | BOXL_AmortizationExpenseOfIntangibleAssetsAcquired
Namespace Prefix: | BOXL_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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