XML 59 R37.htm IDEA: XBRL DOCUMENT v3.20.1
STOCK-BASED COMPENSATION - outstanding options (Details) - Stock Option [Member] - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares, Outstanding 226,075  
Number of Shares, Granted 0  
Number of Shares, Exercised (1,000)  
Number of Shares, Forfeited 0  
Number of Shares, Expired 0  
Number of Shares, Outstanding 225,075 226,075
Number of Shares, Vested 190,075  
Weighted Average Exercise Price per share, Outstanding (in dollars per share) $ 6.30  
Weighted Average Exercise Price per share, Exercised (in dollars per share) 2.92  
Weighted Average Exercise Price per share, Forfeited (in dollars per share) 0  
Weighted Average Exercise Price per share, Expired (in dollars per share) 0  
Weighted Average Exercise Price per share, Outstanding (in dollars per share) 6.32 $ 6.30
Weighted Average Exercise Price per share, Vested (in dollars per share) $ 6.14  
Weighted Average Remaining Contractual Life, Outstanding (Years) 4 years 6 months 4 years 8 months 12 days
Weighted Average Remaining Contractual Life, Vested (Years) 3 years 10 months 24 days  
Aggregate Intrinsic Value, Outstanding and Vested (in dollars) $ 30,036 $ 219,983
Aggregate Intrinsic Value, Vested (in dollars) $ 30,036