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STOCKHOLDERS' EQUITY - Award Type (Details) - USD ($)
12 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Dec. 28, 2013
Stock-based compensation      
Shares reserved for the grant of future share-based awards 627,540 761,078  
Number of Shares      
Granted (in shares) 24,409 25,998  
Stock options      
Unrecognized compensation expense      
Total unrecognized compensation expense $ 891,591    
Recognition of unrecognized compensation expense over weighted average contractual life 1 year 10 months 21 days    
Restricted Stock      
Number of Shares      
Unvested at the beginning of the period (in shares) 105,817 110,431  
Granted (in shares) 122,890 60,896 145,784
Vested (in shares) (98,518) (65,510) (35,353)
Forfeited (in shares) (13,761)    
Unvested at the end of the period (in shares) 116,428 105,817 110,431
Weighted - Average Grant Date Fair Value      
Unvested at the beginning of the period (in dollars per share) $ 5.19 $ 3.99  
Granted (in dollars per share) 8.43 6.87 $ 3.98
Vested (in dollars per share) 5.95 4.72 3.94
Forfeited (in dollars per share) 7.87    
Unvested at the end of the period (in dollars per share) $ 7.66 $ 5.19 $ 3.99
Unrecognized compensation expense      
Total fair value of shares vested and recognized as stock-based compensation expense during the year $ 585,723 $ 309,527  
Annual stock award paid as compensation to outside directors $ 27,500