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Schedule of Lease Amounts Paid to Related Parties (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Amount Charged on Leased Premises $ 81us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty $ 57us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Lease Amounts [Member] | Foster City, CA [Member]    
Amount Charged on Leased Premises 57us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= hgbl_FosterCityCMember
/ us-gaap_StatementScenarioAxis
= hgbl_LeaseAmountsMember		 57us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= hgbl_FosterCityCMember
/ us-gaap_StatementScenarioAxis
= hgbl_LeaseAmountsMember
Lease Amounts [Member] | Edwardsville, IL [Member]    
Amount Charged on Leased Premises $ 24us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= hgbl_EdwardsvilleILMember
/ us-gaap_StatementScenarioAxis
= hgbl_LeaseAmountsMember		 $ 0us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= hgbl_EdwardsvilleILMember
/ us-gaap_StatementScenarioAxis
= hgbl_LeaseAmountsMember