Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Weighted-average Values And Assumptions Used for Stock Options (Details)

v3.20.1
STOCK-BASED COMPENSATION - Weighted-average Values And Assumptions Used for Stock Options (Details) - $ / shares
12 Months Ended
Jan. 17, 2019
Oct. 12, 2018
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected life (years)     6 years 6 years
Dividend     0.00% 0.00%
Weighted-average exercise price $ 1.99 $ 2.61 $ 2.33 $ 2.99
Weighted-average grant-date fair value     $ 1.76 $ 2.30
Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Volatility     93.00% 106.00%
Risk-free interest rate     3.05% 3.05%
Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Volatility     91.00% 91.00%
Risk-free interest rate     1.62% 2.64%