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Inventories - (Summary of the Components of Inventories) (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventory [Line Items]    
Raw materials $ 1,208us-gaap_InventoryRawMaterials $ 1,229us-gaap_InventoryRawMaterials
Work in progress 27us-gaap_InventoryWorkInProcess 33us-gaap_InventoryWorkInProcess
Finished Goods 1,940us-gaap_InventoryFinishedGoods 2,153us-gaap_InventoryFinishedGoods
Inventory, Net $ 3,175us-gaap_InventoryNet $ 3,415us-gaap_InventoryNet