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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, 2012 | $ 21,687,152 | $ 2,194,820 | $ 21,262,140 | $ 1,934,359 | $ 35,114,072 | $ (2,380,434) | $ 79,812,109
Net earnings |  |  |  |  | 7,585,921 |  | 7,585,921
Other comprehensive loss |  |  |  | (715,963) |  |  | (715,963)
Grant of stock options |  |  | 88,369 |  |  |  | 88,369
Exercise stock options | 719,572 | 422,422 | (345,845) |  |  | (543,334) | 252,815
Sale of treasury stock |  |  | 428,794 |  |  | 299,143 | 727,937
Stock dividends | 1,124,304 | 126,685 | 1,782,418 |  | (3,033,406) |  | 1
Conversion Class C to Class A | 83,546 | (83,545) | (1) |  |  |  |
Balance at Dec. 31, 2013 | 23,614,574 | 2,660,382 | 23,215,875 | 1,218,396 | 39,666,587 | (2,624,625) | 87,751,189
Net earnings |  |  |  |  | 7,754,648 |  | 7,754,648
Other comprehensive loss |  |  |  | 220,170 |  |  | 220,170
Grant of stock options |  |  | 391,220 |  |  |  | 391,220
Reverse stock split true up |  | 30 |  |  | (30) |  |
Exercise stock options | 108,824 |  | (34,800) |  |  |  | 74,024
Sale of treasury stock |  |  | 361,679 |  |  | 538,171 | 899,850
Stock dividends | 1,190,040 | 132,767 | 1,997,147 |  | (3,319,954) |  |
Conversion Class C to Class A | 5,042 | (5,041) | (2) |  | 1 |  |
Balance at Dec. 31, 2014 | 24,918,480 | 2,788,138 | 25,931,119 | 1,438,566 | 44,101,252 | (2,086,454) | 97,091,101
Net earnings |  |  |  |  | 12,622,880 |  | 12,622,880
Other comprehensive loss |  |  |  | 95,262 |  |  | 95,262
Grant of stock options |  |  | 387,608 |  |  |  | 387,608
Exercise stock options | 47,922 | 483,304 | (55,717) |  |  | (441,832) | 33,677
Sale of treasury stock |  |  | 666,840 |  |  | 530,396 | 1,197,236
Purchase of treasury stock |  |  |  |  |  | (181,539) | (181,539)
Stock dividends | 1,248,966 | 150,670 | 3,302,732 |  | (4,702,368) |  |
Conversion Class C to Class A | 2,832 | (2,832) |  |  |  |  |
Balance at Dec. 31, 2015 | $ 26,218,200 | $ 3,419,280 | $ 30,232,582 | $ 1,533,828 | $ 52,021,764 | $ (2,179,429) | $ 111,246,225

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