NET LOSS PER SHARE - Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (11,987)	$ (8,805)	$ (25,762)	$ (12,269)
Net loss per share, basic and diluted (USD per share)	$ (0.19)	$ (0.15)	$ (0.41)	$ (0.21)
Weighted average common shares outstanding, basic and diluted (in shares)	63,593	59,715	62,612	59,430