Segment Information (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Geographical Information
Net sales	$ 63,849	$ 43,853
United States
Geographical Information
Net sales	35,708	12,515
Canada
Geographical Information
Net sales	10,751	11,573
Asia/Pacific
Geographical Information
Net sales	15,020	15,207
Europe
Geographical Information
Net sales	1,331	2,344
Middle East/Africa
Geographical Information
Net sales	1,001	1,573
Latin America/Caribbean
Geographical Information
Net sales	$ 38	$ 641