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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
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Dec. 31, 2014 | Dec. 31, 2013
Gross revenues | $ 2,177 hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationRevenue | $ 7,589 hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationRevenue
Gross profit (loss) | 143 hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationGrossProfitLoss | 1,200 hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationGrossProfitLoss
Net income (loss) | $ 143 hgbl_EarningsOfEquityAccountedAssetLiquidationInvestments | $ 1,200 hgbl_EarningsOfEquityAccountedAssetLiquidationInvestments

X
- Definition The amount of gross profit (loss) reported by an Asset Liquidation Investment of the Company, and attributable to the Company as its share. + References No definition available. + Details
Name: | hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationGrossProfitLoss
Namespace Prefix: | hgbl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of gross revenues (loss) reported by an Asset Liquidation Investment of the Company, and attributable to the Company as its share. + References No definition available. + Details
Name: | hgbl_AssetLiquidationInvestmentSummarizedFinancialInformationRevenue
Namespace Prefix: | hgbl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Company's proportionate share of Joint Ventures' net income (loss) reported in the consolidated statement of operations as Earnings (Loss) of Equity Accounted Asset Liquidation Investments and attributable to the Company as its share. + References No definition available. + Details
Name: | hgbl_EarningsOfEquityAccountedAssetLiquidationInvestments
Namespace Prefix: | hgbl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration