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Components of Inventory (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Components of inventory, net of allowances    
Raw materials $ 3,627 $ 2,857
Work-in-process 1,379 1,348
Finished goods 7,560 8,303
Inventory, net $ 12,566 $ 12,508