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Inventories - Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 1,493 $ 1,596
Work-in-process 2,834 3,173
Finished goods 1,126 1,052
Inventory, Gross 5,453 5,821
Less: Allowance (237) (205)
Total inventories $ 5,216 $ 5,616