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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating expenses:
Research and development	$ 10,602	$ 8,791
General and administrative	4,526	3,588
Total operating expenses	15,128	12,379
Loss from operations	(15,128)	(12,379)
Other income:
Other income	38	493
Net loss	(15,090)	(11,886)
Net unrealized gain on short-term marketable securities	1	51
Comprehensive loss	$ (15,089)	$ (11,835)
Net loss per common share, basic and diluted	$ (0.43)	$ (0.42)
Weighted-average number of shares used in computing net loss per common share, basic and diluted	34,744,275	28,499,475

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