SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Weighted Average Shares - (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 01, 2016	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jan. 01, 2016	Dec. 31, 2014	Dec. 31, 2013
Earnings per Common Share
Weighted Average Number of Shares Outstanding, Basic	9,775	9,604	9,393	9,353	9,352	9,347	9,338	9,293	9,505	9,333	9,279
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements									240	129	95
Weighted Average Number of Shares Outstanding, Diluted	10,000	9,822	9,569	9,521	9,474	9,443	9,431	9,426	9,745	9,462	9,374
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									20	94	195
Advertising Costs
Advertising expense									$ 393	$ 306	$ 326