Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 8,407	$ 6,524
Work in process		571
Finished goods:
Manufactured finished goods	65,814	45,594
Deferred inventory costs	1,346	1,073
Total finished goods	75,567	53,762
Valuation adjustment for excess and obsolete inventory	(1,501)	(2,765)
Total inventory	$ 74,066	$ 50,997