Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Inventory [Line Items]
Raw materials	$ 499
Work in process	89	$ 460
Finished goods	1,430	979
Total	2,018	1,439
Current portion	(1,518)	(979)
Non-current portion included in intangible and other assets, net	500	460
Total	$ 2,018	$ 1,439