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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating expenses:
Research and development	$ 19,470	$ 17,379	$ 54,048	$ 39,207
General and administrative	4,883	4,159	14,399	11,164
Total operating expenses	24,353	21,538	68,447	50,371
Loss from operations	(24,353)	(21,538)	(68,447)	(50,371)
Other income, net	23	135	94	875
Net loss	(24,330)	(21,403)	(68,353)	(49,496)
Net unrealized gain (loss) on short-term marketable securities	(8)	(74)	(14)	22
Comprehensive loss	$ (24,338)	$ (21,477)	$ (68,367)	$ (49,474)
Net loss per common share, basic and diluted	$ (0.70)	$ (0.63)	$ (1.96)	$ (1.63)
Weighted-average number of shares used in computing net loss per common share, basic and diluted	34,862,116	34,002,769	34,807,439	30,381,671

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