Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Estimated Fair Value of Stock Options) (Details)

v3.20.1
STOCK-BASED COMPENSATION (Estimated Fair Value of Stock Options) (Details) - Common stock options - $ / shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price (in usd per share) $ 1.74  
Dividend Yield 0.00% 0.00%
Expected Volatility 70.00% 70.00%
Expected Life 7 years 7 years
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price (in usd per share)   $ 1.52
Risk-free interest rate 1.52% 2.52%
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price (in usd per share)   $ 2.98
Risk-free interest rate   2.62%