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Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity |
Common Stock Purchase Warrant Transactions |
|  | Number of Warrants |  |  | Exercise Prices |
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, 2021 |  |  | 669,467 |  |  | $2.52-7.00 |
Expired |  |  | (185,304 | ) |  | $2.52-5.60 |
Exercised |  |  | (194,869 | ) |  | $2.52-5.60 |
Balance December 31, 2022 |  |  | 289,294 |  |  | $5.60-7.00 |
Warrant Expirations |
Shares |  |  | Exercise Price |  |  | Expiration Date |
| 235,722 |  |  | $ | 5.60 |  |  | October 14, 2023 |
| 53,572 |  |  | $ | 7.00 |  |  | November 12, 2023 |
| 289,294 |  |  |  |  |  |  |  |
fair value of stock option awards granted |
|  | February 11, 2021 |  | March 15, 2021 |  | October 20, 2021 |  | September 6, 2022 |  | September 28, 2022 |
Fair value |  | $604,572 |  | $9,860 |  | $473,143 |  | $505,476 |  | $41,799 |
Options issued |  | 283,936 |  | 3,572 |  | 182,166 |  | 165,000 |  | 15,000 |
Exercise price |  | $5.60 |  | $5.60 |  | $5.60 |  | $5.25 |  | $4.75 |
Expected term (in years) |  | 3.0 |  | 3.0 |  | 3.0 |  | 3.0 |  | 3.0 |
Risk-free rate |  | 0.19% |  | 0.33% |  | 0.70% |  | 3.55% |  | 4.12% |
Volatility |  | 97.9% |  | 99.3% |  | 96.6% |  | 89.3% |  | 89.2% |
Share-based Compensation, Stock Options, Activity |
|  | Number of Options |  |  | Weighted Average Exercise Prices |
Balance December 31, 2020 |  |  | 150,000 |  |  | $ | 1.83 |
Granted |  |  | 469,674 |  |  | $ | 5.53 |
Exercised |  |  | (101,786 | ) |  | $ | 1.87 |
Forfeited |  |  | (10,713 | ) |  | $ | 5.60 |
Balance December 31, 2021 |  |  | 507,175 |  |  | $ | 5.25 |
Granted |  |  | 180,000 |  |  | $ | 5.21 |
Exercised |  |  | (116,078 | ) |  | $ | 4.31 |
Expired |  |  | (7,143 | ) |  | $ | 1.96 |
Forfeited |  |  | (28,001 | ) |  | $ | 5.56 |
Balance December 31, 2022 |  |  | 535,953 |  |  | $ | 5.47 |
Outstanding and exercisable at December 31, 2022 |  |  | 535,953 |  |  | $ | 5.47 |

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