Inventories - Schedule of Inventory (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 7,087	$ 6,697
Work-in-process	2,115	1,553
Finished goods	2,970	2,799
Total gross inventories	12,172	11,049
Raw materials	3,446	3,150
Work-in-process	502	431
Finished goods	1,214	1,111
Total reserve	5,162	4,692
Raw materials	3,641	3,547
Work-in-process	1,613	1,122
Finished goods	1,756	1,688
Total net inventories	$ 7,010	$ 6,357