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Stock Option Plans (Details Narrative) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Shares available for grant | 166,750 | 18,650
Cash settlement of stock options | $ 108,155 | $ 342,285
Shares related to settlement of stock options | 10,067 | 7,726
Weighted average remaining contractual term | 6 years |
Stock-based compensation | $ 1,803,302 | $ 1,806,758
Unrecognized compensation cost | $ 3,599,153 |
Unrecognized compensation cost recognition period | 3 years |
Weighted average fair value at the date of grant | $ 11.14 | $ 13.63
Aggregate intrinsic value of outstanding options | $ 1,622,738 | $ 15,436,026
Aggregate intrinsic value of exercisable options | 1,565,553 | 12,128,507
Aggregate intrinsic value of options exercised | $ 747,730 | $ 6,582,918
Employee Plan |  |
Vesting term | Options granted under the 2012 Employee Plan vest 25% one day after the first anniversary of the grant date and 25% one day after each of the next three anniversaries. Under the terms of the 2012 Employee Plan, no option may be granted under that plan after the tenth anniversary of the adoption of the plan. |
2005 Director Plan |  |
Vesting term | The Initial Option vested 25% on the date of grant and 25% on the anniversary of the grant date in each of the following 3 years. Each Annual Option became fully exercisable one day after the date of grant. The exercise price of each option granted equalled the fair market value of the Common Stock on the date the option was granted and expired ten (10) years from the date of grant. |
Shares authorized under plan | 180,000 |
Shares offered under initial option | 5,000 |
Shares offered under annual option | 5,000 |
2017 Director Plan |  |
Vesting term | The Initial Option vests 25% on the date of grant and 25% on the anniversary of the grant date in each of the following 3 years. Each Annual Option becomes fully exercisable one day after the date of grant. The exercise price of each option granted equals the fair market value of the Common Stock on the date the option is granted and expires ten (10) years from the date of grant. |
Shares available for grant | 0 |
Shares authorized under plan | 50,000 |
Shares offered under initial option | 5,000 |
Shares offered under annual option | 5,000 |
Cash fee paid to non salaried directors | $ 61,800 |
2022 Employee Plan |  |
Vesting term | Options granted under the 2022 Employee Plan vest 25% one day after the first anniversary of the grant date and 25% one day after each of the next three anniversaries. As of December 31, 2022, the number of shares available for grant under the 2022 Employee Plan is 166,750. Under the terms of the 2022 Employee Plan, no option may be granted under that plan after the tenth anniversary of the adoption of the plan. |
Shares available for grant | 166,750 |

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