STOCK-BASED COMPENSATION (Details) - USD ($)	9 Months Ended
	Sep. 24, 2016	May 25, 2016	Dec. 26, 2015
Stock-based compensation, additional disclosure
Total unrecognized compensation expense	$ 1,239,770
Recognition of unrecognized compensation expense over weighted average contractual life	2 years
Shares reserved for the grant of future share-based awards	1,254,382		627,540
Director
Number of Shares
Granted (in shares)	15,690
Stock-based compensation, additional disclosure
Annual stock award paid as compensation to outside directors	$ 27,500
Granted (in shares)	15,690
Stock-based compensation expense	$ 144,375
Stock options
Options
Outstanding at the beginning of the period (in shares)	169,260
Exercised (in shares)	(119,910)
Outstanding at the end of the period (in shares)	49,350
Weighted - Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 2.02
Exercised (in dollars per share)	1.98
Outstanding at the end of the period (in dollars per share)	$ 2.12
Stock-based compensation, additional disclosure
Intrinsic value of outstanding exercisable options	$ 822,970
Weighted-average remaining contractual life of options exercisable	1 year 7 days
Stock options | Plan | Class A Common Stock
Stock-based compensation, additional disclosure
Shares available for grant		1,000,000
Stock options | Plan | Class A Common Stock | Maximum
Stock-based compensation, additional disclosure
Number of shares that can be granted in any one year	100,000
Stock options | Prior plans | Class A Common Stock
Stock-based compensation, additional disclosure
Shares available for grant	257,598
Restricted stock
Number of Shares
Unvested at the beginning of the period (in shares)	116,428
Granted (in shares)	113,992
Vested (in shares)	(77,293)
Unvested at the end of the period (in shares)	153,127
Weighted - Average Grant Date Fair Value
Unvested at the beginning of the period (in dollars per share)	$ 7.66
Granted (in dollars per share)	8.00
Vested (in dollars per share)	7.29
Unvested at the end of the period (in dollars per share)	$ 8.10
Total fair value of shares vested and recognized as stock-based compensation expense during the year	$ 563,722
Stock-based compensation, additional disclosure
Granted (in shares)	113,992