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STOCK BASED COMPENSATION (Tables)
 3 Months Ended
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Weighted-Average Black-Scholes Option Pricing Model Assumptions The assumptions used in the Black-Scholes option-pricing model and the weighted-average grant date fair value of the option awards for the periods presented were as follows:
 Three Months ended March 31
20202019
VolatilityNA104.99%
Expected term (in years)NA6
Risk-free rateNA2.24%
Expected dividend yieldNA—
Weighted-average grant date fair value per optionNA$2.24
Stock options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-Based Compensation Activity
The following table is a summary of stock option activity during the three months ended March 31, 2020:
Number of
Options Outstanding		Weighted Average Exercise PriceWeighted Average Remaining Contractual Life (in years)Aggregate Intrinsic Value (in thousands)
Outstanding 2013 & 2014 Plans – December 31, 20192,356,197  $1.89  5.93$628  
Options granted—  —  —  —  
Options exercised(17,184) 1.20  6.09—  
Options forfeited—  —  —  —  
Outstanding – March 31, 20202,339,013  $1.89  5.68$—  
Exercisable – March 31, 20201,906,107  $1.78  5.19$—  
Restricted stock units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-Based Compensation Activity
The following table is a summary of restricted stock units award activity during the three months ended March 31, 2020:

Number of SharesWeighted Average Grant Date Fair Value
Non-vested at beginning of period486,135  2.53  
Shares granted70,000  2.01  
Shares vested(17,444) 1.69  
Non-vested at end of period538,691  $2.18