Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw material and supplies	$ 3,081	$ 3,052
Work in process	480	931
Finished goods	20,981	14,852
Inventory, gross	24,542	18,835
Inventory reserve	(4,351)	(4,076)
Inventory, net	$ 20,191	$ 14,759