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Schedule of Activity of Stock Option Plans (Details) - USD ($)
 9 Months Ended
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.