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Debt - Notes Payable (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Debt        
Loss on extinguishment of debt   $ (1,822)    
Note A        
Debt        
Debt Amount       $ 5,000
Interest Rate (as a percent)       9.45%
Loss on extinguishment of debt   600    
Interest Expenses   $ 400 $ 400  
Series B Warrants        
Debt        
Number of warrants granted 387,932      
Term of warrant 10 years      
warrants exercise price $ 1.16