Quarterly report pursuant to Section 13 or 15(d)

STOCK BASED COMPENSATION - Fair Value Assumptions (Details)

v3.8.0.1
STOCK BASED COMPENSATION - Fair Value Assumptions (Details) - $ / shares
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected term (in years) 6 years 7 years
Expected dividend yield 0.00% 0.00%
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Volatility 132.00% 149.00%
Risk-free rate 1.82% 1.22%
Weighted-average grant date fair value per option (in dollars per share) $ 1.45 $ 0.96
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Volatility 141.00% 152.00%
Risk-free rate 2.19% 1.26%
Weighted-average grant date fair value per option (in dollars per share) $ 3.32 $ 1.15