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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 |  |  |  |  | 11,737,952 |  | 11,737,952
Other comprehensive income (loss) |  |  |  | 450,204 |  |  | 450,204
Grant of stock options |  |  | 253,427 |  |  |  | 253,427
Exercise of stock options | 64,834 |  | 12,374 |  |  |  | 77,208
Sale of treasury stock |  |  | 440,420 |  |  | 634,268 | 1,074,688
Stock Dividends | 274 | 12,768 | 30,779 |  | (43,821) |  |
Conversion Class C to Class A | 17,016 | (17,016) |  |  |  |  |
Balance at Sep. 30, 2016 | 26,300,324 | 3,415,032 | 30,969,582 | (49,154) | 72,219,535 | (1,545,161) | 131,310,158
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 |  |  |  |  | 5,442,702 |  | 5,442,702
Other comprehensive income (loss) |  |  |  | 71,809 |  |  | 71,809
Grant of stock options |  |  | 305,741 |  |  |  | 305,741
Exercise of stock options | 2 | 206,804 | (206,806) |  |  |  |
Sale of treasury stock |  |  | 575,496 |  |  | 574,472 | 1,149,968
Purchase of treasury stock |  |  |  |  |  | (185,470) | (185,470)
Stock Dividends | 930 | 4 | 2,350 |  | (3,284) |  |
Conversion Class C to Class A | 1,214 | (1,214) |  |  |  |  |
Balance at Sep. 30, 2017 | $ 27,640,158 | $ 4,010,052 | $ 35,490,027 | $ 336,631 | $ 72,848,622 | $ (981,609) | $ 139,343,881

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