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UNAUDITED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) | Total | Preferred Stock | Common Stock | Treasury Stock Amount | Additional Paid in Capital | Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Stockholders’ equity, December 30, 2018 at Dec. 31, 2017 | $ 39,134,679 | $ 0 | $ 87,594 | $ 0 | $ 37,675,329 | $ 1,371,756
Stockholders’ equity, December 31, 2018 (in shares) at Dec. 31, 2017 |  |  | 8,759,376 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based compensation | 67,029 |  |  |  | 67,029 |
Exercise of common stock options and warrants (in shares) |  |  | 4,589 |  |  |
Exercise of common stock options and warrants | (7,500) |  | $ 46 |  | (7,546) |
Cash dividend declared | (2,189,844) |  |  |  |  | (2,189,844)
Net income (loss) | 2,465,571 |  |  |  |  | 2,465,571
Stockholders’ equity, March 31, 2019 at Apr. 01, 2018 | 39,469,935 | 0 | $ 87,640 | 0 | 37,734,812 | 1,647,483
Stockholders’ equity, March 31, 2019 (in shares) at Apr. 01, 2018 |  |  | 8,763,965 |  |  |
Stockholders’ equity, December 30, 2018 at Dec. 30, 2018 | 65,702,013 | 0 | $ 102,273 | (24,027) | 57,624,379 | 7,999,388
Stockholders’ equity, December 31, 2018 (in shares) at Dec. 30, 2018 |  |  | 10,227,247 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based compensation | 320,084 |  |  |  | 320,084 |
Cancellation of restricted shares (in shares) |  |  | (2,250) |  |  |
Cancellation of restricted shares | 0 |  | $ (23) |  | 23 |
Exercise of common stock options and warrants (in shares) |  |  | 4,916 |  |  |
Exercise of common stock options and warrants | 0 |  | $ 49 |  | (49) |
Change in accounting principal - operating leases | (200,607) |  |  |  |  | (200,607)
Cash dividend declared | (3,068,847) |  |  |  |  | (3,068,847)
Net income (loss) | 2,496,024 |  |  |  |  | 2,496,024
Stockholders’ equity, March 31, 2019 at Mar. 31, 2019 | $ 65,248,667 | $ 0 | $ 102,299 | $ (24,027) | $ 57,944,437 | $ 7,225,958
Stockholders’ equity, March 31, 2019 (in shares) at Mar. 31, 2019 |  |  | 10,229,913 |  |  |

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