Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net loss	$ (333)	$ (3,018)	$ (25,735)	$ (2,217)
Weighted average common basic shares	41,096	41,041	41,074	41,026
Weighted average common dilutive shares	41,096	41,041	41,074	41,026
Basic and diluted	$ (0.01)	$ (0.07)	$ (0.63)	$ (0.05)