Components of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Finished goods	$ 1,122	$ 850
Work-in-process	2,185	3,332
Inventory, gross	3,307	4,182
Reserve for expiring inventory	(713)	0
Inventory, net	$ 2,594	$ 4,182