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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Components $ 1,563us-gaap_InventoryRawMaterials $ 1,760us-gaap_InventoryRawMaterials
Finished goods 417us-gaap_InventoryFinishedGoods 474us-gaap_InventoryFinishedGoods
Total $ 1,980us-gaap_InventoryNet $ 2,234us-gaap_InventoryNet