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Schedule of Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Jun. 30, 2011
Feb. 29, 2012
Jun. 02, 2014
Goodwill $ 8,846us-gaap_Goodwill $ 8,846us-gaap_Goodwill      
Equity Partners [Member]          
Goodwill     573us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_EquityPartnersMember
   
HGP [Member]          
Goodwill       4,728us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_HgpMember
 
NLEX [Member]          
Goodwill         $ 3,545us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= hgbl_NlexMember