NET LOSS PER SHARE - Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (15,781)	$ (1,217)	$ (41,543)	$ (13,486)
Net loss per share, basic and diluted (USD per share)	$ (0.25)	$ (0.02)	$ (0.66)	$ (0.23)
Weighted average common shares outstanding, basic and diluted (in shares)	64,375	60,652	63,204	59,841