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Consolidated Statements of Stockholders' Equity - USD ($) | Total | Additional Paid-In Capital [Member] | Accumulated Other Comprehensive (Loss) Income [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Class A Common Stock [Member] | Class B Common Stock [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2016 | $ 438,615,320 | $ 236,851,709 | $ (2,254,271) | $ 244,942,913 | $ (41,226,357) | $ 244,834 | $ 56,492
Beginning balance, shares at Dec. 31, 2016 |  |  |  |  |  | 24,483,377 | 5,649,240
Issuance of common stock (stock compensation plans) | 2,488,333 | 2,486,762 |  |  |  | $ 1,571 |
Issuance of common stock (stock compensation plans), shares |  |  |  |  |  | 157,085 |
Stock-based compensation | 15,471,719 | 15,462,479 |  |  |  | $ 9,240 |
Stock-based compensation, Shares |  |  |  |  |  | 924,019 |
Net income (loss) | 7,116,100 |  |  | 7,116,100 |  |  |
Cash dividends | (15,041,051) |  |  | (15,041,051) |  |  |
Grant of stock options |  | 600,608 |  | (600,608) |  |  |
Reclassification of tax effects |  |  | (475,687) | 475,687 |  |  |
Other comprehensive income (loss) | 45,683 |  | 45,683 |  |  |  |
Ending balance at Dec. 31, 2017 | 448,696,104 | 255,401,558 | (2,684,275) | 236,893,041 | (41,226,357) | $ 255,645 | $ 56,492
Ending balance, shares at Dec. 31, 2017 |  |  |  |  |  | 25,564,481 | 5,649,240
Issuance of common stock (stock compensation plans) | 2,470,969 | 2,469,220 |  |  |  | $ 1,749 |
Issuance of common stock (stock compensation plans), shares |  |  |  |  |  | 174,899 |
Stock-based compensation | 2,853,911 | 2,853,111 |  |  |  | $ 800 |
Stock-based compensation, Shares |  |  |  |  |  | 79,961 |
Net income (loss) | (32,760,340) |  |  | (32,760,340) |  |  |
Cash dividends | (15,765,614) |  |  | (15,765,614) |  |  |
Grant of stock options |  | 534,534 |  | (534,534) |  |  |
Reclassification of equity unrealized gains |  |  | (4,918,655) | 4,918,655 |  |  |
Other comprehensive income (loss) | (6,625,129) |  | (6,625,129) |  |  |  |
Ending balance at Dec. 31, 2018 | 398,869,901 | 261,258,423 | (14,228,059) | 192,751,208 | (41,226,357) | $ 258,194 | $ 56,492
Ending balance, shares at Dec. 31, 2018 |  |  |  |  |  | 25,819,341 | 5,649,240
Issuance of common stock (stock compensation plans) | 2,227,198 | 2,225,527 |  |  |  | $ 1,671 |
Issuance of common stock (stock compensation plans), shares |  |  |  |  |  | 167,096 |
Stock-based compensation | 4,253,840 | 4,251,665 |  |  |  | $ 2,175 |
Stock-based compensation, Shares |  |  |  |  |  | 217,498 |
Net income (loss) | 47,151,744 |  |  | 47,151,744 |  |  |
Cash dividends | (16,219,393) |  |  | (16,219,393) |  |  |
Grant of stock options |  | 415,986 |  | (415,986) |  |  |
Other comprehensive income (loss) | 14,732,229 |  | 14,732,229 |  |  |  |
Ending balance at Dec. 31, 2019 | $ 451,015,519 | $ 268,151,601 | $ 504,170 | $ 223,267,573 | $ (41,226,357) | $ 262,040 | $ 56,492
Ending balance, shares at Dec. 31, 2019 |  |  |  |  |  | 26,203,935 | 5,649,240

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