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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventory [Line Items]    
Work-in-process $ 2,987us-gaap_InventoryWorkInProcessNetOfReserves $ 2,222us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 13,122us-gaap_InventoryFinishedGoodsNetOfReserves 12,734us-gaap_InventoryFinishedGoodsNetOfReserves
Total inventories $ 16,109us-gaap_InventoryNet $ 14,956us-gaap_InventoryNet [1]
[1] The financial information in this column was derived from audited financial statements included in the Company's 2014 Annual Report on Form 10-K.