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6) Earnings Per Share | 6 Months Ended
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Jun. 30, 2020
Disclosure Text Block [Abstract] |
6) Earnings Per Share | 6) Earnings Per Share The basic and diluted earnings per share amounts were calculated as follows:
|  |  | Three Months Ended June 30 |  | Six Months Ended June 30
|  |  | 2020 |  | 2019 |  | 2020 |  | 2019
Numerator: |  |  |  |  |  |  |  |
| Net earnings |  | $ 20,557,047 |  | $ 3,480,054 |  | $ 21,981,496 |  | $ 5,410,372
Denominator: |  |  |  |  |  |  |  |
| Basic weighted-average shares outstanding |  | 18,764,831 |  | 18,576,031 |  | 18,703,390 |  | 18,567,907
Effect of dilutive securities: |  |  |  |  |  |  |  |
| Employee stock options |  | 418,660 |  | 234,245 |  | 332,859 |  | 239,669
| Diluted weighted-average shares outstanding |  | 19,183,491 |  | 18,810,276 |  | 19,036,249 |  | 18,807,576
Basic net earnings per share |  | $1.10 |  | $0.19 |  | $1.18 |  | $0.29
Diluted net earnings per share |  | $1.07 |  | $0.19 |  | $1.15 |  | $0.29
Net earnings per share amounts have been retroactively adjusted for the effect of annual stock dividends. For the six months June 30, 2020 and 2019, there were -0- and 857,227 of anti-dilutive employee stock option shares, respectively, that were not included in the computation of diluted net earnings per common share as their effect would be anti-dilutive.

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