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Schedule of Results of Operations Attributable to the Company from the Joint Ventures in Which it is Invested (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Gross revenues $ 2,177hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationRevenue $ 7,589hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationRevenue
Gross profit (loss) 143hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationGrossProfitLoss 1,200hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationGrossProfitLoss
Net income (loss) $ 143hgbl_EarningsOfEquityAccountedAssetLiquidationInvestments $ 1,200hgbl_EarningsOfEquityAccountedAssetLiquidationInvestments