Inventories - Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Raw materials	$ 1,606	$ 1,596
Work-in-progress	4,561	3,173
Finished goods	1,556	1,052
Inventory, Gross	7,723	5,821
Less: Allowance for obsolescence	(269)	(205)
Total inventories	$ 7,454	$ 5,616

Certain changes made in the current period to the value and amount of inventory reported.

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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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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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