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Derivative Warrant Liabilities - Schedule of Valuation of Derivative Warrant Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Balances at November 28, 2016 $ 575  
Exercised  
Cancelled  
Changes in fair value (262)
Balances at December 31, 2016 313 575
Series A (2011) [Member]    
Balances at November 28, 2016  
Exercised  
Cancelled  
Changes in fair value  
Balances at December 31, 2016
Series A (2013) [Member]    
Balances at November 28, 2016 43  
Exercised  
Cancelled  
Changes in fair value (31)  
Balances at December 31, 2016 12 43
Series A (2013) [Member]    
Balances at November 28, 2016 18  
Exercised  
Cancelled  
Changes in fair value (9)  
Balances at December 31, 2016 9 18
Series A (2015) [Member]    
Balances at November 28, 2016 45  
Exercised  
Cancelled  
Changes in fair value (23)  
Balances at December 31, 2016 22 45
Series A (2016) [Member]    
Balances at November 28, 2016 81  
Exercised  
Cancelled  
Changes in fair value (38)  
Balances at December 31, 2016 43 81
Series B (2016) [Member]    
Balances at November 28, 2016 388  
Exercised  
Cancelled  
Changes in fair value (161)  
Balances at December 31, 2016 $ 227 $ 388