Note 19 - Enterprise-wide Disclosures - Operating Segments Depreciation, Amortization, and Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Depreciation and amortization	$ 39,084	$ 30,261	$ 30,632
Total assets	1,284,644	800,600
Operating Segments [Member]
Depreciation and amortization	35,161	28,259	29,066
Total assets	1,229,952	719,957
Corporate, Non-Segment [Member]
Depreciation and amortization	3,923	2,002	$ 1,566
Total assets	$ 54,692	$ 80,643