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Legal Proceedings (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013
Intellectual property licensing | $ 200 hgbl_IntellectualPropertyRevenue | $ 0 hgbl_IntellectualPropertyRevenue | $ 824 hgbl_IntellectualPropertyRevenue

X
- Definition Revenue earned during the period relating to consideration received from another party for the right to use, or own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. + References No definition available. + Details
Name: | hgbl_IntellectualPropertyRevenue
Namespace Prefix: | hgbl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration