Note 12 - Segment and Geographic Information - Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands		6 Months Ended
		Jul. 02, 2016	Jun. 27, 2015	Jan. 02, 2016
UNITED STATES
Long-lived assets	[1]	$ 23,985		$ 23,965
Additions to long-lived assets		2,783	$ 6,615
CHINA
Long-lived assets	[1]	70,325		37,241
Additions to long-lived assets		3,847	4,080
CANADA
Long-lived assets	[1]	10,925		10,488
Additions to long-lived assets		137	878
Other Countries [Member]
Long-lived assets	[1]	119,275		90,874
Additions to long-lived assets		13,450	14,815
Long-lived assets	[1]	224,510		$ 162,568
Additions to long-lived assets		$ 20,217	$ 26,388

[1] Long-lived assets consists of net property, plant and equipment.