NET LOSS PER SHARE - BASIC AND DILUTED NET INCOME (LOSS) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net loss	$ (12,865)	$ (2,695)
Shares used in computation of basic and diluted net loss per share (weighted average common shares outstanding)	29,024	28,493
Basic and diluted net loss per share (in dollars per share)	$ (0.44)	$ (0.09)