Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw material and supplies	$ 3,088	$ 3,052
Work in process	484	931
Finished goods	20,930	14,852
Inventory, gross	24,502	18,835
Inventory reserve	(4,263)	(4,076)
Inventory, net	$ 20,239	$ 14,759