Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 7,070	$ 4,976
Work-in-process	9,442	5,087
Finished products	40,484	42,947
Deferred cost of sales	4,338	4,553
Total inventory	$ 61,334	$ 57,563