Inventories - Schedule of Inventory (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Raw materials	$ 6,697	$ 6,369
Work-in-process	1,553	1,989
Finished goods	2,799	3,361
Total gross inventories	11,049	11,719
Raw materials	3,150	2,986
Work-in-process	431	389
Finished goods	1,111	1,089
Total reserve	4,692	4,464
Raw materials	3,547	3,383
Work-in-process	1,122	1,600
Finished goods	1,688	2,272
Total net inventories	$ 6,357	$ 7,255