Operating Segment and Geographic Information (Details 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 09, 2016	Mar. 19, 2016	Dec. 26, 2015	Oct. 03, 2015	Jul. 11, 2015	Mar. 21, 2015	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Segment Reporting Information [Line Items]
Net Sales	$ 45,826	$ 38,793	$ 48,463	$ 34,568	$ 43,744	$ 34,584	$ 43,795	$ 33,419	$ 167,650	$ 155,542	$ 137,975
North America [Member]
Segment Reporting Information [Line Items]
Net Sales									165,048	152,890	135,585
Europe [Member]
Segment Reporting Information [Line Items]
Net Sales									1,271	1,234	1,408
Other
Segment Reporting Information [Line Items]
Net Sales									$ 1,331	$ 1,418	$ 982