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STOCK-BASED COMPENSATION (Estimated Fair Value of Stock Options) (Details) - Common stock options - $ / shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share price (in dollars per share) $ 5.39  
Dividend Yield 0.00% 0.00%
Expected Volatility 60.00% 60.00%
Expected Life 7 years 7 years
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share price (in dollars per share) $ 1.93 $ 4.36
Risk-free interest rate 1.49% 2.09%
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share price (in dollars per share) $ 2.00 $ 4.37
Risk-free interest rate 1.74% 2.14%