Operating Segment and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 29, 2012	Oct. 06, 2012	Jul. 14, 2012	Mar. 24, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 09, 2011	Mar. 19, 2011	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Net sales	$ 40,789	$ 34,206	$ 42,029	$ 30,565	$ 36,668	$ 28,734	$ 40,850	$ 27,998	$ 147,589	$ 134,250	$ 120,656
North America [Member]
Net sales									127,013	112,907	100,921
Europe [Member]
Net sales									13,220	12,240	11,486
Other [Member]
Net sales									$ 7,356	$ 9,103	$ 8,249