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Capital Leases (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Capital Leases    
Capital lease installment $ 3  
Imputed interest rate (as a percent) 3.25%  
Capital lease future payments    
2017 (remainder of) $ 8  
2018 33  
2019 33  
2020 33  
2021 33  
Thereafter 107  
Total payments 247  
Less: amount representing imputed interest at 3.25% (28)  
Present value of payments 219  
Less: current portion (33) $ (26)
Capital lease obligations, net of current portion $ 186 $ 213