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Stock Options (Tables) | 12 Months Ended
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Dec. 31, 2021
Stock Options |
Schedule of Stock Option Activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted-Average |  | ​ | ​
​ | ​ | ​ | ​ | Weighted -Average | ​ | Remaining | ​ | ​ | ​
​ | ​ | Number of | ​ | Exercise | ​ | Contractual Term | ​ | Aggregate
​ | ​ | Options | ​ | Price | ​ | (years) | ​ | Intrinsic Value
Outstanding at January 1, 2020 |  | 6,828,303 | ​ | $ | 1.86 |  |  |  | ​ |
Granted |  | 1,080,000 | ​ |  | 1.37 |  |  |  | ​ |
Exercised |  | (1,357,116) | ​ |  | 1.97 |  |  |  | ​ |
Forfeited/Expired |  | (644,303) | ​ |  | 3.06 |  |  |  | ​ |
Outstanding at December 31, 2020 | ​ | 5,906,884 | ​ | $ | 1.61 | ​ | 6.86 | ​ | $ | 89,405
Granted | ​ | 1,226,300 | ​ | ​ | 6.84 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (1,556,288) | ​ | ​ | 2.01 | ​ | ​ | ​ | ​ | ​
Forfeited/Expired | ​ | (40,000) | ​ | ​ | 1.41 | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2021 |  | 5,536,896 | ​ | $ | 2.66 |  | 7.52 | ​ | $ | 19,154,463
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at December 31, 2021 |  | 3,266,872 | ​ | $ | 1.68 |  | 6.69 | ​ | $ | 13,943,444
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested and Expected to Vest at December 31, 2021 |  | 5,536,896 | ​ | $ | 2.66 |  | 7.52 | ​ | $ | 19,154,463
Schedule of weighted average assumptions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Years Ended December 31, |
​ | ​ | 2021 | ​ | 2020 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average fair value of options granted |  | $ | 3.73 |  | $ | 0.61 | ​
Risk-free interest rate |  | ​ | 0.22% - 0.82 | % |  | 0.29%-0.56 | %
Expected life (years) |  | ​ | 3-6 | ​ |  | 5-6 | ​
Expected volatility factor |  | ​ | 58% - 68 | % |  | 46.75%-50.09 | %
Expected dividends |  | ​ | None | ​ |  | None | ​
Summary of restricted shares under the Company's Plan | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-Average
​ | ​ | ​ | ​ | Grant Date Fair
​ | ​ | Number of Shares | ​ | Value
​ | ​ | ​ | ​ | ​ | ​
Outstanding January 1, 2020 | ​ | 75,000 | ​ | $ | 1.38
Granted | ​ | - | ​ | ​ | ​
Vested | ​ | (25,000) | ​ | ​ | ​
Unvested at December 31, 2020 | ​ | 50,000 | ​ | ​ | ​
Granted | ​ | - | ​ | ​ | ​
Vested |  | (25,000) |  | ​ | ​
Forfeited/Expired |  | - |  | ​ | ​
Unvested at December 31, 2021 |  | 25,000 | ​ | $ | 1.38

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