Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
CAPITAL TRANSACTIONS Black-Scholes Option-Pricing Model (Details) - Stock options - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life 5 years 5 years
Risk-free interest rate (as a percent) 2.80% 1.80%
Expected volatility (as a percent) 38.20% 39.80%
Dividend yield (as a percent) 0.00% 0.00%
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value (in dollars per share) $ 3.0  
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value (in dollars per share) $ 3.5