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SHARE-BASED PAYMENTS - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted in period (in shares)     738,893 449,537 2,176,330  
Number of options (in shares) 2,045,143 2,122,897 2,028,847 2,045,143 2,122,897 905,413
Outstanding options, weighted average exercise price (in dollars per share) $ 5.69 $ 6.54 $ 4.48 $ 5.69 $ 6.54 $ 11.66
Number of exercises in period (in shares)     0 8,369 48,802  
Shares issued for consulting services     $ 370,000 $ 18,000 $ 185,000  
Stock Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock, shares authorized (in shares)     7,436,682.4      
Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     2 years      
Award exercise period     5 years      
Exercisable options, weighted average remaining contractual term     3 years 7 months 1 day      
Stock options granted in period (in shares)     740,000 450,000    
Number of options (in shares)     2,030,000      
Number of exercisable options (in shares)     1,660,000      
Outstanding options, weighted average exercise price (in dollars per share) 4.96   $ 4.48 $ 4.96    
Options, vested and expected to Vest, aggregate intrinsic value     $ 0      
Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     3 years      
Number of RSUs granted in period (in shares)     1,390,000 1,210,000 280,000  
Exercisable options, weighted average exercise price (in dollars per share) 2.12 3.87   $ 2.12 $ 3.87  
Grants in period, grant date intrinsic value (in dollars per share) $ 1,690,000 $ 302,165        
Unrecognized compensation costs related to unvested stock options     $ 110,000      
Unrecognized compensation costs related to RSU awards     $ 1,260,000      
Number of exercises in period (in shares)       8,369 48,802  
Shares issued for consulting services       $ 20,000 $ 180,000  
Exercisable options, intrinsic value $ 10,000 $ 60,000   $ 10,000 $ 60,000  
Maximum | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercisable options, weighted average remaining contractual term     10 years