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Debt - Summary of Outstanding Borrowings (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Total debt $ 5,142 $ 5,330
Short-term portion (5,142) (5,330)
Total long-term debt, net 0 0
Line of credit | 2016 Credit and Security Agreement    
Debt Instrument [Line Items]    
Total debt 3,277  
Line of credit | 2013 Loan and Security Agreement    
Debt Instrument [Line Items]    
Total debt   3,278
Loans payable | Credit agreement    
Debt Instrument [Line Items]    
Total debt 4,046 5,000
Discount on Term Loan (1,977) (2,785)
Unamortized debt issuance costs related to Term Loan $ (204) $ (163)