Inventories - Summary of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Inventory, Net [Abstract]
Finished goods	$ 12,119	$ 10,310
Work-in-process	7,778	7,492
Raw materials	17,705	19,021
Less: Inventory reserves	(7,694)	(4,597)
Inventories, net	$ 29,908	$ 32,226

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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