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Fair Value Measurements, Recurring and Nonrecurring (Details)
$ in Thousands
Jun. 30, 2016
USD ($)
Investments $ 942
Warrant liabilities (1,661)
Convertible debentures (16,570)
Financial instruments fair value (17,289)
Level 1 [Member]  
Investments 942
Warrant liabilities 0
Convertible debentures (16,570)
Financial instruments fair value (15,628)
Level 2 [Member]  
Investments 0
Warrant liabilities (1,661)
Convertible debentures 0
Financial instruments fair value (1,661)
Level 3 [Member]  
Investments 0
Warrant liabilities 0
Convertible debentures 0
Financial instruments fair value $ 0