Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (25,070)	$ (36,045)
Other comprehensive loss:
Unrealized losses on short-term investments		(26)
Comprehensive loss	$ (25,070)	$ (36,071)