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Earnings Per Share | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share |
(15) | Earnings Per Share
Net income per share calculation information is as follows:
|  | Year ended December 31, |
|  | 2017 |  |  | 2018 |
Net income |  | $ | 87,131,169 |  |  | $ | 6,481,049 |
Weighted-average shares outstanding: |  |  |  |  |  |  |  |
Basic |  |  | 27,696,790 |  |  |  | 27,444,110 |
Effect of dilutive restricted stock |  |  | 95,912 |  |  |  | 89,873 |
Diluted |  |  | 27,792,702 |  |  |  | 27,533,983 |
Net income per Class A and Class B common share - basic |  | $ | 3.15 |  |  | $ | 0.24 |
Net income per Class A and Class B common share - diluted |  | $ | 3.14 |  |  | $ | 0.24 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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