Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Inventory [Line Items]
Raw materials	$ 813
Work in process	89	$ 460
Finished goods	1,007	979
Total	1,909	1,439
Current portion	(1,096)	(979)
Non-current portion included in intangible and other assets, net	813	460
Total	$ 1,909	$ 1,439