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Subsequent Events - 20F (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Mar. 08, 2016
USD ($)
Jan. 29, 2016
USD ($)
Jan. 08, 2016
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Mar. 07, 2016
USD ($)
Jan. 27, 2016
USD ($)
Subsequent Event [Line Items]                    
Common stock, reverse split ratio     0.2              
Draw down of undrawn balance       $ 9,400 $ 6,800 $ 15,765 $ 0 $ 0    
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Common stock, reverse split ratio     0.2              
Subsequent Event [Member] | Unsecured Revolving Convertible Notes [Member]                    
Subsequent Event [Line Items]                    
Maximum principal amount available to be drawn                 $ 16,265 $ 13,765
Draw down of undrawn balance $ 2,500 $ 2,000