Product Recall (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Mar. 28, 2015	Jun. 25, 2016	Jun. 27, 2015
Net revenues	$ 69,263	$ 66,422		$ 139,118	$ 144,029
Cost of revenues	58,996	58,397		120,034	139,704
Gross profit	10,267	8,025		19,084	4,325
Operating expenses
Selling, general and administrative expenses	8,493	10,217		16,602	19,369
Impairment of intangible asset					9,277
Operating loss	1,774	(2,192)		2,482	(24,321)
Loss before income taxes	(546)	(3,120)		(2,194)	(25,979)
Income tax benefit	268	1,169		898	9,393
Net loss (loss)	$ (278)	(1,951)		$ (1,296)	(16,586)
Voluntary Product Recall
Cost of revenues		1,127			16,387
Gross profit		(1,127)			(16,387)
Operating expenses
Selling, general and administrative expenses		1,267			1,500
Impairment of intangible asset					9,277
Operating loss		(2,394)			(27,164)
Loss before income taxes		(2,394)			(27,164)
Income tax benefit		897			9,812
Net loss (loss)		(1,497)			(17,352)
Additional product recall costs for account receivable reserves		$ (200)	$ 200
Incremental production costs due to utilizing co-packers					1,100
Customer Relationships | Voluntary Product Recall
Operating expenses
Impairment of intangible asset					$ 9,300