Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw material and supplies	$ 2,843	$ 3,165
Work in process	371	221
Finished goods	15,790	20,774
Inventory, gross	19,004	24,160
Inventory reserve	(3,181)	(3,361)
Inventory, net	$ 15,823	$ 20,799