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SHARE-BASED PAYMENTS - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants in period, weighted average exercise price (in dollars per share)     $ 1.77   $ 2.92  
Number of options (in shares) 1,989,519   1,989,519   1,487,433 1,732,754
Outstanding options, weighted average exercise price (in dollars per share) $ 2.83   $ 2.83   $ 3.43 $ 3.84
Number of grants in period, net of forfeitures (in shares)     706,774   296,450  
Share-based compensation $ 670,000 $ 710,000 $ 2,370,000 $ 2,500,000    
Stock Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock, shares authorized (in shares) 13,027,350   13,027,350      
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 21 days      
Number of grants in period (in shares)     710,000 300,000    
Number of options (in shares) 1,990,000   1,990,000      
Number of exercisable options (in shares) 1,590,000   1,590,000      
Outstanding options, weighted average exercise price (in dollars per share) $ 2.83   $ 2.83      
Exercisable options, weighted average exercise price (in dollars per share) $ 3.04   $ 3.04      
Options, vested and expected to Vest, aggregate intrinsic value $ 0   $ 0      
Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     3 years      
Number of grants in period, net of forfeitures (in shares)     740,000 720,000    
Grants in period, grant date intrinsic value (in dollars per share)     $ 1,970,000 $ 2,510,000    
Unrecognized compensation costs related to unvested stock options     $ 80,000.00      
Unrecognized compensation costs related to RSU awards     $ 890,000      
Share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition     2 years      
Stock Appreciation Rights (SARs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     5 years      
Number of grants in period (in shares)       2,200,000    
Grants in period, weighted average exercise price (in dollars per share)       $ 1.25    
Unrecognized compensation costs related to RSU awards     $ 490,000      
Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants in period, weighted average exercise price (in dollars per share)     $ 1.79      
Outstanding options, weighted average exercise price (in dollars per share) $ 15.61   $ 15.61   $ 15.61 $ 15.61
Maximum | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercisable options, weighted average remaining contractual term     10 years      
Share-based Compensation Award, Tranche One | Stock Appreciation Rights (SARs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants in period, weighted average exercise price (in dollars per share)     $ 5.00      
Period of exercise price     90 days      
Share-based Compensation Award, Tranche Two | Stock Appreciation Rights (SARs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants in period, weighted average exercise price (in dollars per share)     $ 7.00      
Period of exercise price     90 days      
Share-based Compensation Award, Tranche Three | Stock Appreciation Rights (SARs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants in period, weighted average exercise price (in dollars per share)     $ 10.00      
Common Stock | Stock Appreciation Rights (SARs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grants in period, weighted average exercise price (in dollars per share)     $ 2.92