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Summary of Activities in Shares of Capital Stock (Details) - shares | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Common Class A [Member] |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |
Common stock, shares, outstanding, beginning | 17,642,722 | 16,595,783
Exercise of stock options | 50,223 | 27,926
Conversion of class C to class A | 207 | 48,527
Common stock, shares, outstanding, ending | 17,693,152 | 16,672,236
Common Class C [Member] |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |
Common stock, shares, outstanding, beginning | 2,866,565 | 2,679,603
Exercise of stock options |  |
Conversion of class C to class A | (207) | (48,527)
Common stock, shares, outstanding, ending | 2,866,358 | 2,631,076

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