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Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) (Parenthetical) - shares	Aug. 31, 2018	Jun. 22, 2018	May 09, 2018
Cohuborate, Ltd [Member]
Issuance of Class A common stock, number of shares			257,200
Qwizdom, Inc [Member]
Issuance of Class A common stock, number of shares		142,857
EOSEDU, LLC [Member]
Issuance of Class A common stock, number of shares	100,000

X

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=BOXL_CohuborateLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=BOXL_QwizdomIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=BOXL_EOSEDULLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: