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v3.24.1

Activity of stock options exercised (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Total intrinsic value of stock options exercised | $ (11,982) | $ 164,176
Cash received from stock option exercises | $ 212,815 | $ 151,749
Exercised (in shares) | (25,000) |
Equity Option [Member] |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Balance as of December 31, 2021 (in shares) |  | 1,378,122
Balance as of December 31, 2022 (in $ per share) | $ 2.93 | $ 2.81
Granted (in shares) |  | 49,000
Granted (in $ per share) |  | $ 3.03
Exercised (in shares) | (138,909) | (106,190)
Exercised (in $ per share) | $ 1.53 | $ 1.43
Canceled (in shares) | (6,698) | (24,210)
Canceled (in $ per share) | $ 1.46 | $ 3.12
Balance as of December 31, 2022 (in shares) | 1,296,722 |
Balance as of December 31, 2023 (in shares) | 1,151,115 | 1,296,722
Balance as of December 31, 2023 (in $ per share) | $ 3.11 | $ 2.93
Exercisable (in shares) | 1,068,449 |
Exercisable (in $ per share) | $ 2.88 |
Unvested (in shares) | 82,666 |
Unvested (in $ per share) | $ 6.08 |

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