Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 5,049	$ 7,978
Work-in-process	11,339	9,505
Finished products	55,706	42,434
Deferred cost of sales	3,775	3,429
Total inventory	$ 75,869	$ 63,346