Supplemental Disclosures to Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2017	Dec. 29, 2015	Dec. 30, 2014
Supplemental Cash Flow Elements [Abstract]
Interest paid (net of amounts capitalized)	$ 2,394	$ 839	$ 0
Income taxes paid (net of refunds)	427	354	811
Purchases of property and equipment accrued in accounts payable	$ 1,431	$ 1,414	$ 37