Basis of Presentation (Details) - Common Stock [Member] $ / shares in Units, $ in Millions	Oct. 06, 2020 USD ($) $ / shares shares
Number Shares Issuance Public Offering	5,462,500
Public Offering Price Per Share \| $ / shares	$ 1.75
Number Of Shares Exercise Of Underwriters Option To Purchase	712,500
Proceeds From Issuance Of Public Offering \| $	$ 8.7

Number of shares exercise of the underwriters option to purchase.

No definition available.

Name:	hgbl_NumberOfSharesExerciseOfUnderwritersOptionToPurchase
Namespace Prefix:	hgbl_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration