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Equity (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity |
Common Stock Purchase Warrant Transactions |
|  | Number of Warrants |  |  | Exercise Prices |
Balance December 31, 2019 |  |  | 921,438 |  |  | $2.52-3.08 |
Issued |  |  | 400,002 |  |  | $2.52-5.60 |
Expired |  |  | (772,628 | ) |  | $2.52-3.08 |
Exercised |  |  | (122,024 | ) |  | $ | 2.80 |
Balance December 31, 2020 |  |  | 426,788 |  |  | $2.52-5.60 |
Issued |  |  | 289,294 |  |  | $5.60-7.00 |
Exercised |  |  | (46,615 | ) |  | $ | 2.52 |
Balance December 31, 2020 |  |  | 669,467 |  |  | $2.52-7.00 |
Warrant Expirations |
| Shares |  |  | Exercise Price |  |  | Expiration Date |
| 33,070 |  |  | $ | 2.52 |  |  | April 21, 2022 |
| 347,103 |  |  | $ | 5.60 |  |  | August 28, 2022 |
| 235,722 |  |  | $ | 5.60 |  |  | October 14, 2023 |
| 53,572 |  |  | $ | 7.00 |  |  | November 12, 2023 |
| 669,467 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value |
|  | February 11, 2021 |  |  | March 15, 2021 |  |  | October 20, 2021 |
Fair value |  | $ | 604,572 |  |  | $ | 9,860 |  |  | $ | 473,143 |
Options issued |  |  | 283,936 |  |  |  | 3,572 |  |  |  | 182,143 |
Exercise price |  | $ | 5.60 |  |  | $ | 5.60 |  |  | $ | 5.60 |
Expected term (in years) |  |  | 3.0 |  |  |  | 3.0 |  |  |  | 3.0 |
Risk-free rate |  |  | 0.19 | % |  |  | 0.33 | % |  |  | 0.70 | %
Volatility |  |  | 97.9 | % |  |  | 99.3 | % |  |  | 96.6 | %
Share-based Compensation, Stock Options, Activity |
|  | Number of Options |  |  | Exercise Prices |
Balance December 31, 2019 |  |  | 375,893 |  |  | $ | 1.40-2.52 |
Exercised |  |  | (82,143 | ) |  | $ | 1.40-2.52 |
Expired |  |  | (143,750 | ) |  | $ | 1.40-2.52 |
Balance December 31, 2020 |  |  | 150,000 |  |  | $ | 1.40-1.96 |
Granted |  |  | 469,674 |  |  | $ | 5.60 |
Exercised |  |  | (101,786 | ) |  | $ | 1.40-1.96 |
Forfeited |  |  | (10,713 | ) |  | $ | 1.96-5.60 |
Balance December 31, 2021 |  |  | 507,175 |  |  | $ | 1.96-5.60 |
Exercisable at December 31, 2021 |  |  | 507,175 |  |  | $ | 1.96-5.60 |

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