Quarterly report pursuant to Section 13 or 15(d)

COMMON STOCK WARRANT LIABILITY (Details)

v3.10.0.1
COMMON STOCK WARRANT LIABILITY (Details) - USD ($)
$ / shares in Units, $ in Millions
 6 Months Ended
May 13, 2016
Jun. 30, 2018
Dec. 31, 2017
Class of Warrant or Right [Line Items]      
Common stock warrant liability   $ 2.1 $ 2.5
Line of Credit | Second Lien Term Loan | Warrant to Purchase Common Equity      
Class of Warrant or Right [Line Items]      
Warrants issued (in shares) 1,006,568    
Warrant exercise price (in dollars per share) $ 1.67    
Period for mandatory registration rights to maintain ownership interest 2 years    
Period for measuring repurchase value 21 days    
Expected contractual term   7 years 10 months 13 days  
Expected stock price volatility rate   43.00%  
Expected dividend yield   0.00%  
Expected risk-free interest rate   2.82%  
Unsecured Debt | Second Lien Term Loan | Warrant to Purchase Common Equity      
Class of Warrant or Right [Line Items]      
Term of unsecured note 4 years    
Minimum | Unsecured Debt | Second Lien Term Loan | Warrant to Purchase Common Equity      
Class of Warrant or Right [Line Items]      
Interest rate on unsecured note 13.25%