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SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 354,844 442,956
Allocated Share-based Compensation Expense $ 1,120 $ 1,200
R S U Weighted    
Number of shares    
Number of nonvested shares, beginning of period (in shares) 1,580,187  
Granted, nonvested, number of shares (in shares) 721,750  
Vested, number of shares (in shares) (839,348)  
Nonvested options forfeited, number of shares (in shares) (105,706)  
Number of nonvested shares, end of period (in shares) 1,356,882  
Weighted Average Grant- Date Fair Value    
Nonvested, weighted average grant date fair value, beginning of period (in dollars per share) $ 1.99  
Granted, nonvested, weighted average grant date fair value (in dollars per share) 2.92  
Vested, weighted average grant date fair value (in dollars per share) 1.99  
Nonvested options forfeited, weighted average grant date fair value (in dollars per share) 2.24  
Nonvested, weighted average grant date fair value, end of period (in dollars per share) $ 2.47  
Restricted Stock Units (RSUs)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 720,000 1,130,000