Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
(Loss) gain for write-down and disposal of property and equipment, net	$ 19	$ (17)	$ 27
Depreciation and amortization expense relative to property and equipment	2,300	4,000	4,800
Cost of products sold and services provided	$ 700	$ 2,800	$ 3,700