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Schedule of Activity of Stock Option Plans (Details) - USD ($) | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Common Class A [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Number of shares, outstanding, beginning | 1,024,351 |  | 1,072,863 |
Weighted average exercise price, outstanding, beginning | $ 4.38 |  | $ 4.22 |
Number of Shares, adjustment for effect of stock dividends | 47,780 |  | 47,594 |
Number of shares, granted | 4,000 |  |  |
Number of shares, exercised | (71,330) |  | (134,362) |
Number of shares, cancelled | (1,591) |  |  |
Number of shares, outstanding, ending | 1,003,210 |  | 986,095 |
Weighted average exercise price, outstanding, ending | $ 4.58 |  | $ 4.31 |
Number of shares, options exercisable | 978,835 |  | 986,095 |
Weighted average exercise price, options exercisable | $ 4.49 |  | $ 4.31 |
Number of shares, available options for future grant | 1,239,795 |  | 364,851 |
Weighted average contractual term of options outstanding | 4 years 3 months 25 days |  | 4 years 11 months 8 days |
Weighted average contractual term of options exercisable | 4 years 2 months 8 days |  | 4 years 11 months 8 days |
Aggregated intrinsic value of options outstanding | $ 1,775,100 | [1] | $ 3,868,045 | [2]
Aggregated intrinsic value of options exercisable | $ 1,819,950 | [1] | $ 3,868,045 | [2]
Common Class C [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Number of shares, outstanding, beginning | 821,146 |  | 662,666 |
Weighted average exercise price, outstanding, beginning | $ 5.26 |  | $ 4.61 |
Number of Shares, adjustment for effect of stock dividends | 41,057 |  | 33,136 |
Number of shares, granted |  |  |  |
Number of shares, exercised |  |  |  |
Number of shares, cancelled |  |  |  |
Number of shares, outstanding, ending | 862,203 |  | 695,802 |
Weighted average exercise price, outstanding, ending | $ 5.26 |  | $ 4.61 |
Number of shares, options exercisable | 804,703 |  | 695,802 |
Weighted average exercise price, options exercisable | $ 5.04 |  | $ 4.61 |
Number of shares, available options for future grant | 17,523 |  | 279,825 |
Weighted average contractual term of options outstanding | 6 years 9 months |  | 6 years 25 days |
Weighted average contractual term of options exercisable | 6 years 7 months 17 days |  | 6 years 25 days |
Aggregated intrinsic value of options outstanding | $ 939,395 | [1] | $ 2,515,840 | [2]
Aggregated intrinsic value of options exercisable | $ 1,055,445 | [1] | $ 2,515,840 | [2]
[1] | The Company used a stock price of $6.35 as of September 30, 2022 to derive intrinsic value.
[2] | The Company used a stock price of $8.23 as of September 30, 2021, which was the closing price of the Company’s Class A shares on Nasdaq for that day, to derive intrinsic value.

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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