Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Schedule of Fair Value of Liabilities on Recurring Basis (Details)

v3.20.1
Fair Value Measurements - Schedule of Fair Value of Liabilities on Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Total fair value $ 11,596 $ 64,687 $ 1,437
Warrant Derivative Liability [Member]      
Total fair value 3,558 16,492 1,437
Debt Derivative Liability [Member]      
Total fair value 8,038 48,195
Fair Value, Inputs, Level 1 [Member]      
Total fair value  
Fair Value, Inputs, Level 1 [Member] | Warrant Derivative Liability [Member]      
Total fair value  
Fair Value, Inputs, Level 1 [Member] | Debt Derivative Liability [Member]      
Total fair value  
Level 2 [Member]      
Total fair value  
Level 2 [Member] | Warrant Derivative Liability [Member]      
Total fair value  
Level 2 [Member] | Debt Derivative Liability [Member]      
Total fair value  
Level 3 [Member]      
Total fair value 11,596 64,687  
Level 3 [Member] | Warrant Derivative Liability [Member]      
Total fair value 3,558 16,492  
Level 3 [Member] | Debt Derivative Liability [Member]      
Total fair value $ 8,038 $ 48,195