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Schedule of Nonvested Option Activity (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Options, Unvested at beginning of year 1,200,000hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber 2,600,000hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber
Options granted 100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Options, Vested (447,500)hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod (790,000)hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod
Options, Forfeited (17,500)hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnvestedOptionsForfeited (810,000)hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnvestedOptionsForfeited
Options, Unvested at end of year 835,000hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber 1,200,000hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber
Weighted Average Grant Date Fair Value, Unvested at beginning of year $ 1.67hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue $ 1.23hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Weighted Average Grant Date Fair Value, Granted $ 0.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 0.76us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Weighted Average Grant Date Fair Value, Vested $ 1.73hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue $ 1.16hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Weighted Average Grant Date Fair Value, Forfeited $ 1.73hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnvestedOptionsForfeitedWeightedAverageGrantDateFairValue $ 0.53hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardUnvestedOptionsForfeitedWeightedAverageGrantDateFairValue
Weighted Average Grant Date Fair Value, Unvested at end of year $ 1.48hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue $ 1.67hgbl_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue