CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (74,218)	$ (51,930)
Unrealized gain (loss) on short-term investments	(26)	35
Comprehensive loss	$ (74,244)	$ (51,895)