Quarterly report pursuant to Section 13 or 15(d)

Components of Inventory (Detail)

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Components of Inventory (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Schedule Of Inventory [Line Items]    
Raw materials $ 3,474 $ 4,017
Work-in-process 1,752 1,949
Finished goods 6,519 5,176
Inventory, net $ 11,745 $ 11,142