Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 4,285	$ 4,041
Finished goods	7,292	8,229
Reserves for excess, obsolete, and slow-moving inventories and valuation reserves - Raw Materials	(1,132)	(1,261)
Reserves for excess, obsolete, and slow-moving inventories and valuation reserves - Finished Goods	(2,778)	(2,951)
Inventories, net	$ 7,667	$ 8,058