v3.10.0.1
STOCKHOLDERS' EQUITY - Restricted Stock (Details) - Restricted stock - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Restricted Stock          
Outstanding at period start (in shares)     548,005    
Granted (in shares)     175,541    
Forfeited (in shares)     (1,335)    
Vested (in shares)     (547,670)    
Outstanding at period end (in shares) 174,541   174,541   548,005
Weighted-Average Remaining Contractual Terms (in years)     2 years 4 months 24 days   3 months 18 days
Restricted stock exercisable (in shares) 0   0    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]          
Unrecognized compensation expense $ 2,951   $ 2,951    
Unrecognized compensation expense, weighted average period of recognition (in years)     2 years 4 months 24 days    
Stock-based compensation expense, discount rate         15.00%
General and Administrative Expense          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]          
Stock-based compensation expense $ 267 $ 354 $ 2,899 $ 1,081