Inventories - Schedule of Inventory (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 6,619	$ 6,697
Work-in-process	2,358	1,553
Finished goods	3,011	2,799
Total gross inventories	11,988	11,049
Raw materials	3,436	3,150
Work-in-process	641	431
Finished goods	1,275	1,111
Total reserve	5,352	4,692
Raw materials	3,183	3,547
Work-in-process	1,717	1,122
Finished goods	1,736	1,688
Total net inventories	$ 6,462	$ 6,357