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Schedule of Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2011
Feb. 29, 2012
Jun. 02, 2014
Goodwill $ 8,846us-gaap_Goodwill $ 5,301us-gaap_Goodwill      
Equity Partners [Member]          
Goodwill 573us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_EquityPartnersMember		 573us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_EquityPartnersMember		 573us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_EquityPartnersMember		    
HGP [Member]          
Goodwill 4,728us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_HgpMember		 4,728us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_HgpMember		   4,728us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_HgpMember		  
NLEX [Member]          
Goodwill $ 3,545us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_NlexMember		 $ 0us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_NlexMember		     $ 3,545us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_NlexMember