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Statements of Stockholders' Equity - USD ($) | Class A Common Stock | Class C Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Treasury Stock | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 | $ 26,218,200 | $ 3,419,280 | $ 30,232,582 | $ (499,358) | $ 60,525,404 | $ (2,179,429) | $ 117,716,679
Net earnings |  |  |  |  | 12,188,627 |  | 12,188,627
Other comprehensive income |  |  |  | 764,180 |  |  | 764,180
Stock based compensation expense |  |  | 343,577 |  |  |  | 343,577
Exercise of stock options | 85,268 | 209,950 | (179,112) |  |  |  | 116,106
Sale of treasury stock |  |  | 621,144 |  |  | 808,818 | 1,429,962
Stock Dividends | 1,315,838 | 193,934 | 3,795,055 |  | (5,304,827) |  |
Conversion Class C to Class A | 18,706 | (18,706) |  |  |  |  |
Balance at Dec. 31, 2016 | 27,638,012 | 3,804,458 | 34,813,246 | 264,822 | 67,409,204 | (1,370,611) | 132,559,131
Net earnings |  |  |  |  | 14,112,934 |  | 14,112,934
Other comprehensive income |  |  |  | 338,348 |  |  | 338,348
Stock based compensation expense |  |  | 395,603 |  |  |  | 395,603
Exercise of stock options | 16,366 | 206,804 | (213,323) |  |  |  | 9,847
Sale of treasury stock |  |  | 712,591 |  |  | 822,270 | 1,534,861
Purchase of treasury stock |  |  |  |  |  | (382,734) | (382,734)
Stock Dividends | 1,385,270 | 198,992 | 2,416,925 |  | (4,001,187) |  |
Conversion Class C to Class A | 31,506 | (31,506) |  |  |  |  |
Balance at Dec. 31, 2017 | $ 29,071,154 | $ 4,178,748 | $ 38,125,042 | $ 603,170 | $ 77,520,951 | $ (931,075) | $ 148,567,990

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