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Debt - SRS Note Exchange Agreement (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Jul. 31, 2017
Jun. 30, 2017
Dec. 31, 2017
Jul. 06, 2017
Debt Instrument [Line Items]        
Extinguishment of debt $ 11,562      
Issuance of shares from treasury for SRS Note Exchange     $ 2,159  
Promissory Note | SRS Note        
Debt Instrument [Line Items]        
Long-term Debt and Accrued Interest 2,562      
Notes Payable 1,785      
Interest Payable 777      
Stated interest rate percentage       15.00%
Long-term Debt, Waiver of Final Installment, Number of Days   60 days    
Extinguishment of debt $ 2,562      
Issuance of shares from treasury for SRS Note Exchange (in shares) 7,306,930      
Issuance of shares from treasury for SRS Note Exchange $ 2,192      
Share price (in dollars per share) $ 0.30