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Summary of Activities in Shares of Capital Stock (Details) - shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Common Class A [Member] |  |
Class of Stock [Line Items] |  |
Common Stock, Shares, Outstanding | 16,595,783 | 16,107,779
Exercise of stock options | 160,282 | 68,970
Stock dividends | 837,410 | 405,210
Conversion of Class C to Class A | 49,247 | 13,824
Common Stock, Shares, Outstanding | 17,642,722 | 16,595,783
Common Class C [Member] |  |
Class of Stock [Line Items] |  |
Common Stock, Shares, Outstanding | 2,679,603 | 2,500,887
Exercise of stock options | 104,656 | 130,820
Stock dividends | 131,553 | 61,720
Conversion of Class C to Class A | (49,247) | (13,824)
Common Stock, Shares, Outstanding | 2,866,565 | 2,679,603

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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 + Details
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- Definition Other than shares newly issued, the number of additional shares issued (for example, a stock split) or canceled (for example, to correct a share issuance), during the period under the plan. + 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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of shares of common and preferred stock issued as dividends during the period. Excludes stock splits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 + Details
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