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Schedule of Activity of Stock Option Plans (Details) - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Common Class A [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Number of shares, outstanding, beginning | 976,605 |  | 1,024,351 |
Weighted average exercise price, outstanding, beginning | $ 4.56 | [1] | $ 4.38 | [2]
Number of Shares, adjustment for effect of stock dividends | 38,266 |  | 47,780 |
Number of shares, granted | 16,000 |  | 4,000 |
Number of shares, exercised | (233,180) |  | (71,330) |
Number of shares, cancelled |  |  | (1,591) |
Number of shares, outstanding, ending | 797,691 |  | 1,003,210 |
Weighted average exercise price, outstanding, ending | $ 4.78 | [1] | $ 4.58 | [2]
Number of shares, options exercisable | 770,066 |  | 978,835 |
Weighted average exercise price, options exercisable | $ 4.73 | [1] | $ 4.49 | [2]
Number of shares, available options for future grant | 171,386 |  | 1,239,795 |
Weighted average contractual term of options outstanding | 4 years 8 months 8 days |  | 4 years 3 months 25 days |
Weighted average contractual term of options exercisable | 4 years 6 months 10 days |  | 4 years 2 months 8 days |
Aggregated intrinsic value of options outstanding | $ 2,438,675 | [3] | $ 1,775,100 | [4]
Aggregated intrinsic value of options exercisable | $ 2,398,360 | [3] | $ 1,819,950 | [4]
Common Class C [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Number of shares, outstanding, beginning | 1,157,203 |  | 821,146 |
Weighted average exercise price, outstanding, beginning | $ 5.31 | [1] | $ 5.26 | [2]
Number of Shares, adjustment for effect of stock dividends | 57,859 |  | 41,057 |
Number of shares, granted |  |  |  |
Number of shares, exercised |  |  |  |
Number of shares, cancelled |  |  |  |
Number of shares, outstanding, ending | 1,215,062 |  | 862,203 |
Weighted average exercise price, outstanding, ending | $ 5.31 | [1] | $ 5.26 | [2]
Number of shares, options exercisable | 1,141,312 |  | 804,703 |
Weighted average exercise price, options exercisable | $ 5.25 | [1] | $ 5.04 | [2]
Number of shares, available options for future grant | 834,750 |  | 17,523 |
Weighted average contractual term of options outstanding | 6 years 1 month 24 days |  | 6 years 9 months |
Weighted average contractual term of options exercisable | 6 years 10 days |  | 6 years 7 months 17 days |
Aggregated intrinsic value of options outstanding | $ 3,074,037 | [3] | $ 939,395 | [4]
Aggregated intrinsic value of options exercisable | $ 2,955,012 | [3] | $ 1,055,445 | [4]
[1] | Adjusted for the effect of annual stock dividends.
[2] | Adjusted for the effect of annual stock dividends.
[3] | The Company used a stock price of $7.84 as of September 30, 2023 to derive intrinsic value.
[4] | The Company used a stock price of $6.35 as of September 30, 2022 to derive intrinsic value.

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