SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Weighted Average Number of Shares) (Details) - shares	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 24, 2017	Jun. 25, 2017	Mar. 26, 2017	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 31, 2017	Dec. 25, 2016	Dec. 27, 2015
Schedule of Weighted Average Number of Shares, Diluted [Line Items]
Weighted-average number of basic common shares outstanding	8,759,376	8,759,376	8,746,100	8,668,955	8,668,485	8,658,061	7,711,050	7,388,536	8,733,941	8,107,637	7,079,459
Weighted-average number of diluted common shares outstanding	8,759,376	9,077,147	9,050,596	8,924,419	8,930,542	9,028,398	8,052,996	7,646,726	9,038,187	8,399,883	7,288,705
Employee Stock Option
Schedule of Weighted Average Number of Shares, Diluted [Line Items]
Effect of dilutive securities (in shares)									268,765	258,617	199,596
Warrant
Schedule of Weighted Average Number of Shares, Diluted [Line Items]
Effect of dilutive securities (in shares)									35,481	33,629	9,650