Quarterly report pursuant to Section 13 or 15(d)

4. Stock Incentive Plan (Details)

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4. Stock Incentive Plan (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]    
Stock options outstanding, beginning 1,087,463 1,105,896
Stock options, granted 205,110 0
Stock options, forfeited 0 0
Stock options, exercised 0 (18,433)
Stock options outstanding, ending 1,292,573 1,087,463
Weighted average exercise price outstanding, beginning $ 2.94 $ 2.99
Weighted average exercise price, granted 14.55 0.00
Weighted average exercise price, forfeited 0.00 0.00
Weighted average exercise price, exercised 0.00 5.97
Weighted average exercise price outstanding, ending $ 4.78 $ 2.94