Lease commencement date.

No definition available.

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

- Definition

Lessee operating lease, incremental borrowing rate.

+ References

No definition available.

+ Details

Name:	hgbl_LesseeOperatingLeaseIncrementalBorrowingRate
Namespace Prefix:	hgbl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of locations.

+ References

No definition available.

+ Details

Name:	hgbl_NumberOfLocations
Namespace Prefix:	hgbl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Area of land subject to a ground lease.

+ References

No definition available.

+ Details

Name:	us-gaap_LandSubjectToGroundLeases
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

+ Details

Name:	us-gaap_OperatingLeaseExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash payments to lessor's for use of assets under operating leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_StatementGeographicalAxis=hgbl_HaywardFGHKIndustrialLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=hgbl_LibertyIndustrialParkLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Leases (Narrative) (Details) $ in Thousands			9 Months Ended
Leases (Narrative) (Details) $ in Thousands	Aug. 12, 2022 USD ($) ft²	Oct. 27, 2020 USD ($) ft²	Sep. 30, 2022 USD ($) Location	Sep. 30, 2021 USD ($)	Sep. 01, 2022	Apr. 01, 2021	Jan. 01, 2019
Number of locations \| Location			4
Initial term for lease		90 months
Lessee operating lease, incremental borrowing rate					5.50%	4.95%	5.25%
Lease expense			$ 500	$ 500
Hayward F G H K Industrial L L C
Area of lease \| ft²		30,321
Lease commencement date		Apr. 01, 2021
Initial monthly base rent		$ 27,289
Hayward F G H K Industrial L L C \| Maximum [Member]
Initial monthly base rent		$ 33,562
Liberty Industrial Park, LLC
Area of lease \| ft²	6,627
Initial monthly base rent	$ 11,266
Liberty Industrial Park, LLC \| Maximum [Member]
Initial monthly base rent	$ 13,180