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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 |  |  |  |  | 4,832,511 |  | 4,832,511
Other comprehensive loss |  |  |  | 315,978 |  |  | 315,978
Grant of stock options |  |  | 62,589 |  |  |  | 62,589
Exercise of stock options | 265,842 | 422,422 | 104,185 |  |  | (543,334) | 249,115
Sale of treasury stock |  |  | 175,956 |  |  | 68,314 | 244,270
Conversion Class C to Class A | 83,246 | (83,245) | (1) |  |  |  |
Balance at Jun. 30, 2013 | 22,036,040 | 2,533,997 | 21,604,343 | 2,250,337 | 39,947,309 | (2,855,454) | 85,516,572
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 |  |  |  |  | 2,762,911 |  | 2,762,911
Other comprehensive loss |  |  |  | 923,000 |  |  | 923,000
Grant of stock options |  |  | 128,526 |  |  |  | 128,526
Exercise of stock options | 69,910 |  | (19,611) |  |  |  | 50,299
Sale of treasury stock |  |  | 147,542 |  |  | 243,590 | 391,132
Stock Dividends | 3,446 | (1) | 4,910 |  | (8,355) |  |
Conversion Class C to Class A | 1,778 | (1,776) | (2) |  |  |  |
Balance at Jun. 30, 2014 | $ 23,689,708 | $ 2,658,605 | $ 23,477,240 | $ 2,141,396 | $ 42,421,143 | $ (2,381,035) | $ 92,007,057

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