Product Recall (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2016	Sep. 26, 2015	Sep. 24, 2016	Sep. 26, 2015
Net revenues	$ 66,529	$ 69,865	$ 205,647	$ 213,894
Cost of revenues	58,605	61,165	178,639	200,869
Gross profit	7,924	8,700	27,008	13,025
Operating expenses
Selling, general and administrative expenses	9,190	9,233	25,792	28,602
Impairment of intangible asset				9,277
Operating loss	(1,266)	(533)	1,216	(24,854)
Loss before income taxes	(3,653)	(2,275)	(5,847)	(28,254)
Income tax benefit	1,089	538	1,987	9,931
Net loss (loss)	$ (2,564)	(1,737)	$ (3,860)	(18,323)
Voluntary Product Recall
Cost of revenues		418		16,805
Gross profit		(418)		(16,805)
Operating expenses
Selling, general and administrative expenses		594		2,094
Impairment of intangible asset				9,277
Operating loss		(1,012)		(28,176)
Loss before income taxes		(1,012)		(28,176)
Income tax benefit		240		9,904
Net loss (loss)		(772)		(18,272)
Total charges for the product recall		3,500		18,800
Incremental production costs due to utilizing co-packers		1,100		2,200
Recall-related insurance recoveries		4,200		4,200
Customer Relationships | Voluntary Product Recall
Operating expenses
Impairment of intangible asset				9,300
Selling, General and Administrative Expenses | Voluntary Product Recall
Operating expenses
Professional fees		$ 600		$ 2,100