Note 6 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Property and equipment, gross		$ 519,962	$ 487,818
Accumulated depreciation		(307,317)	(283,310)
Property and Equipment	[1]	212,645	204,508
Land [Member]
Property and equipment, gross		17,743	16,063
Building [Member]
Property and equipment, gross		130,919	121,216
Equipment [Member]
Property and equipment, gross		$ 371,300	$ 350,539

[1] Long-lived assets include tangible assets physically located in foreign countries.