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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted |
Schedule of Earnings Per Share, Basic and Diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Three Months Ended 30-June |  | Six Months Ended 30-June
|  |  | 2021 |  |  |  | 2020 |  |  |  | 2021 |  |  |  | 2020 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 11,257,479 |  |  | $ | 20,557,047 |  |  | $ | 23,386,194 |  |  | $ | 21,981,496 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average shares outstanding |  |  | 20,106,954 |  |  |  | 19,719,792 |  |  |  | 20,093,834 |  |  |  | 19,658,351 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee stock options |  |  | 784,817 |  |  |  | 439,593 |  |  |  | 826,048 |  |  |  | 349,502 |
Diluted weighted-average shares outstanding |  |  | 20,891,771 |  |  |  | 20,159,385 |  |  |  | 20,919,882 |  |  |  | 20,007,853 |
Basic net earnings per share |  | $ | 0.56 |  |  | $ | 1.04 |  |  | $ | 1.16 |  |  | $ | 1.12 |
Diluted net earnings per share |  | $ | 0.54 |  |  | $ | 1.02 |  |  | $ | 1.12 |  |  | $ | 1.10 |
Schedule of Activity of Stock Option Plans |
Schedule of Activity of Stock Option Plans |  |  |  |
|  | Class A |  | Class C
Outstanding shares at December 31, 2019 |  |  | 16,107,779 |  |  |  | 2,500,887 |
Exercise of stock options |  |  | 33,774 |  |  |  | — |
Stock dividends |  |  | 404,839 |  |  |  | 61,720 |
Conversion of Class C to Class A |  |  | 11,162 |  |  |  | (11,162 | )
Outstanding shares at June 30, 2020 |  |  | 16,557,554 |  |  |  | 2,551,445 |
Outstanding shares at December 31, 2020 |  |  | 16,595,783 |  |  |  | 2,679,603 |
Exercise of stock options |  |  | 80,948 |  |  |  | — |
Stock dividends |  |  | 836,263 |  |  |  | 131,554 |
Conversion of Class C to Class A |  |  | 48,527 |  |  |  | (48,527 | )
Outstanding shares at June 30, 2021 |  |  | 17,561,521 |  |  |  | 2,762,630 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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