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Fair Value Measurements, Recurring and Nonrecurring (Details)
$ in Thousands
Mar. 31, 2016
USD ($)
Investments $ 984
Warrant liabilities (2,116)
Convertible debentures (16,198)
Financial instruments fair value (17,330)
Level 1 [Member]  
Investments 984
Warrant liabilities 0
Convertible debentures (16,198)
Financial instruments fair value (15,214)
Level 2 [Member]  
Investments 0
Warrant liabilities (2,116)
Convertible debentures 0
Financial instruments fair value (2,116)
Level 3 [Member]  
Investments 0
Warrant liabilities 0
Convertible debentures 0
Financial instruments fair value $ 0