Annual report pursuant to Section 13 and 15(d)

CAPITAL TRANSACTIONS Black-Scholes Option-Pricing Model (Details)

v3.20.1
CAPITAL TRANSACTIONS Black-Scholes Option-Pricing Model (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value (in dollars per share) $ 3.44  
Stock options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life 5 years 5 years
Risk-free interest rate (as a percent) 1.50% 2.80%
Expected volatility (as a percent) 43.20% 38.20%
Dividend yield (as a percent) 0.00% 0.00%
Stock options | Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value (in dollars per share) $ 3.0  
Stock options | Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value (in dollars per share) $ 3.5