Note 13 - Business Unit Segment Information (Details) - Long-lived Assets by Geographical Area (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013		Dec. 29, 2012
Note 13 - Business Unit Segment Information (Details) - Long-lived Assets by Geographical Area [Line Items]
Long-lived assets	$ 120,300	[1]	$ 120,911	[1]
United States [Member]
Note 13 - Business Unit Segment Information (Details) - Long-lived Assets by Geographical Area [Line Items]
Long-lived assets	13,963	[1]	14,433	[1]
China [Member]
Note 13 - Business Unit Segment Information (Details) - Long-lived Assets by Geographical Area [Line Items]
Long-lived assets	40,157	[1]	41,504	[1]
Canada [Member]
Note 13 - Business Unit Segment Information (Details) - Long-lived Assets by Geographical Area [Line Items]
Long-lived assets	13,907	[1]	13,839	[1]
Other Countries [Member]
Note 13 - Business Unit Segment Information (Details) - Long-lived Assets by Geographical Area [Line Items]
Long-lived assets	$ 52,273	[1]	$ 51,135	[1]

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