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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 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
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     422,956   738,893
Allocated Share-based Compensation Expense $ 520 $ 740 $ 1,720 $ 1,784  
R S U Weighted          
Number of shares          
Number of nonvested shares, beginning of period (in shares)     1,909,477    
Granted, nonvested, number of shares (in shares)     1,191,132    
Vested, number of shares (in shares)     (1,486,126)    
Nonvested options forfeited, number of shares (in shares)     0    
Number of nonvested shares, end of period (in shares) 1,614,483   1,614,483   1,909,477
Weighted Average Grant- Date Fair Value          
Nonvested, weighted average grant date fair value, beginning of period (in dollars per share)     $ 2.17    
Granted, nonvested, weighted average grant date fair value (in dollars per share)     1.70    
Vested, weighted average grant date fair value (in dollars per share)     2.24    
Nonvested options forfeited, weighted average grant date fair value (in dollars per share)     0.00    
Nonvested, weighted average grant date fair value, end of period (in dollars per share) $ 1.99   $ 1.99   $ 2.17
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     1,190,000 1,130,000