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Subsequent Events (Details) - Term Loan - August 2017 Term Loan - USD ($)
$ / shares in Units, $ in Thousands
Feb. 02, 2018
Aug. 08, 2017
Scenario, Forecast | Payment by November 30, 2017    
Subsequent Event [Line Items]    
Debt exit fees   $ 140
Scenario, Forecast | Payment After November 30, 2017    
Subsequent Event [Line Items]    
Debt exit fees   280
Subsequent event    
Subsequent Event [Line Items]    
Long-term debt $ 2,000 2,000
Debt fees   $ 30
Subsequent event | August Warrant    
Subsequent Event [Line Items]    
Number of warrants to purchase shares issued (in shares)   450,000
Exercise price of warrant (in dollars per share)   $ 0.80