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Subsequent Events - Additional Information (Details)	Mar. 03, 2021
Subsequent Event [Member] \| C3bank [Member]
Extended maturity date	Apr. 05, 2021

X

- Definition

Debt maturity extended date.

+ References

No definition available.

+ Details

Name:	hgbl_DebtMaturityExtendedDate
Namespace Prefix:	hgbl_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=hgbl_C3BankCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: