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Schedule of Segment Reporting Information, by Segment (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Revenues from external customers $ 1,985 $ 1,592  
Earnings (loss) of equity accounted asset liquidation investments (net of tax of $0) (30) 802  
Interest expense 71 95  
Depreciation and amortization 118 121  
Segment income (loss) (915) (1,000)  
Segment assets 23,716 55,127 49,995
Asset Liquidation Segment [Member]
      
Revenues from external customers 1,985 1,392  
Earnings (loss) of equity accounted asset liquidation investments (net of tax of $0) (30) 802  
Other income 0 0  
Interest expense 71 95  
Depreciation and amortization 118 121  
Segment income (loss) (471) (587)  
Investment in equity accounted asset liquidation investees 1,011 2,901  
Segment assets 19,212 20,297  
Patent Licensing [Member]
      
Revenues from external customers   200  
Earnings (loss) of equity accounted asset liquidation investments (net of tax of $0) 0 0  
Other income 0 0  
Interest expense 0 0  
Depreciation and amortization 0 0  
Segment income (loss) (11) 50  
Investment in equity accounted asset liquidation investees 0 0  
Segment assets 28 228  
Segment Totals [Member]
      
Revenues from external customers 1,985 1,592  
Earnings (loss) of equity accounted asset liquidation investments (net of tax of $0) (30) 802  
Other income 0 0  
Interest expense 71 95  
Depreciation and amortization 118 121  
Segment income (loss) (482) (537)  
Investment in equity accounted asset liquidation investees 1,011 2,901  
Segment assets $ 19,240 $ 20,525