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Inventory (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Inventory [Line Items]
Raw materials, current	$ 6,614	$ 4,246
Work in process	11,592	11,310
Finished goods	3,624	5,026
Finished goods inventory held by others		627	1,422
Total inventory, current	21,830	21,209
Raw materials, long-term		5,482
Total inventory	$ 21,830	$ 26,691

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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