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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) | Total | Preferred Stock | Common Stock | Treasury Stock Amount | Additional Paid in Capital | Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Stockholders’ equity, beginning of period at Dec. 27, 2015 | $ 25,928,424 | $ 0 | $ 73,880 | $ 0 | $ 20,446,948 | $ 5,407,596
Stockholders’ equity (in shares), beginning of period at Dec. 27, 2015 |  |  | 7,387,955 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based compensation | 313,988 |  |  |  | 313,988 |
Issuance of shares, net of offering costs (in shares) |  |  | 1,191,246 |  |  |
Issuance of shares, net of offering costs | 15,108,756 |  | $ 11,912 |  | 15,096,844 |
Exercise of common stock options and warrants (shares) |  |  | 89,284 |  |  |
Exercise of common stock options and warrants | 285,801 |  | $ 893 |  | 284,908 |
Option cancellation agreement | 0 |  |  |  |  |
Cash dividends declared | (8,030,922) |  |  |  |  | (8,030,922)
Net income | 6,882,407 |  |  |  |  | 6,882,407
Stockholders’ equity (in shares), end of period at Dec. 25, 2016 |  |  | 8,668,485 |  |  |
Stockholders’ equity, end of period at Dec. 25, 2016 | 40,488,454 | 0 | $ 86,685 | 0 | 36,142,688 | 4,259,081
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based compensation | 447,301 |  |  |  | 447,301 |
Issuance of shares, net of offering costs (in shares) |  |  | 70,670 |  |  |
Issuance of shares, net of offering costs | 992,500 |  | $ 707 |  | 991,793 |
Exercise of common stock options and warrants (shares) |  |  | 20,221 |  |  |
Exercise of common stock options and warrants | 93,749 |  | $ 202 |  | 93,547 |
Option cancellation agreement | 0 |  |  |  |  |
Cash dividends declared | (8,735,759) |  |  |  |  | (8,735,759)
Net income | 5,848,434 |  |  |  |  | 5,848,434
Stockholders’ equity (in shares), end of period at Dec. 31, 2017 |  |  | 8,759,376 |  |  |
Stockholders’ equity, end of period at Dec. 31, 2017 | 39,134,679 | 0 | $ 87,594 | 0 | 37,675,329 | 1,371,756
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based compensation | 1,069,482 |  |  |  | 1,069,482 |
Issuance of shares, net of offering costs (in shares) |  |  | 1,293,750 |  |  |
Issuance of shares, net of offering costs | 21,360,138 |  | $ 12,938 |  | 21,347,200 |
Issuance of restricted shares, net of 828 shares of treasury stock (shares) |  |  | 41,172 |  |  |
Issuance of restricted shares, net of 828 shares of treasury stock | (24,027) |  | $ 412 | (24,027) | (412) |
Exercise of common stock options and warrants (shares) |  |  | 132,949 |  |  |
Exercise of common stock options and warrants | 869,278 |  | $ 1,329 |  | 867,949 |
Option cancellation agreement | (3,335,169) |  |  |  | (3,335,169) |
Cash dividends declared | (10,921,909) |  |  |  |  | (10,921,909)
Net income | 17,549,541 |  |  |  |  | 17,549,541
Stockholders’ equity (in shares), end of period at Dec. 30, 2018 |  |  | 10,227,247 |  |  |
Stockholders’ equity, end of period at Dec. 30, 2018 | $ 65,702,013 | $ 0 | $ 102,273 | $ (24,027) | $ 57,624,379 | $ 7,999,388
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Treasury stock, shares | 828 |  |  |  |  |

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