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v3.22.1

Equity-Based Compensation (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Equity-Based Compensation |  |
Schedule of activity relating to the Plan | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of |  | Weighted Average
Unit Options |  | Units |  | Exercise Price
Outstanding at December 31, 2021 | ​ | 88,878 | ​ | $ | 0.63
Granted | ​ | 1,201 | ​ |  | 1.65
Exercised | ​ | (2,928) | ​ |  | 0.16
Forfeited | ​ | (92) | ​ |  | 1.23
Expired | ​ | (59) | ​ |  | 0.50
Outstanding at March 31, 2022 | ​ | 87,000 | ​ |  | 0.66
Exercisable at March 31, 2022 | ​ | 73,817 | ​ |  | 0.57
| ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Weighted Average
Unit Options |  | Number of Units |  | Exercise Price
Outstanding at December 31, 2020 |  | 74,824 | ​ | $ | 0.49
Granted |  | 19,362 | ​ |  | 1.11
Exercised |  | (3,483) | ​ |  | 0.21
Forfeited |  | (653) | ​ |  | 0.99
Expired |  | (1,172) | ​ |  | 0.45
Outstanding at December 31, 2021 |  | 88,878 | ​ |  | 0.63
Exercisable at December 31, 2021 |  | 75,506 | ​ |  | 0.55
Schedule of assumptions used in determining fair value | ​
​ | ​ | ​ | ​
​ |  | 2022 |
Risk-free interest rate |  | 1.44 | %
Expected dividend yield |  | NA | ​
Expected option life |  | 6.25 | years
Expected price volatility |  | 73.98 | %
| ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Risk-free interest rate |  | 0.62% – 1.31% | ​ | 0.37% – 0.59%
Expected dividend yield |  | NA | ​ | NA
Expected option life |  | 6.25 years | ​ | 6.25 years
Expected price volatility |  | 64.60% – 73.98% | ​ | 64.6% – 69.21%

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