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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