Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating expenses:
Research and development	$ 11,201	$ 10,795	$ 39,351	$ 33,652
General and administrative	6,052	7,450	19,819	20,900
Total operating expenses	17,253	18,245	59,170	54,552
Loss from operations	(17,253)	(18,245)	(59,170)	(54,552)
Interest and other income, net	1,190	818	2,886	2,708
Net loss	$ (16,063)	$ (17,427)	$ (56,284)	$ (51,844)
Net loss per share, basic	$ (0.27)	$ (0.30)	$ (0.95)	$ (0.97)
Net loss per share, diluted	$ (0.27)	$ (0.30)	$ (0.95)	$ (0.97)
Weighted average common shares outstanding, basic	59,269,965	58,583,476	58,963,280	53,655,314
Weighted average common shares outstanding, diluted	59,269,965	58,583,476	58,963,280	53,655,314
Comprehensive loss:
Net loss	$ (16,063)	$ (17,427)	$ (56,284)	$ (51,844)
Other comprehensive income (loss):
Unrealized gains (losses) on marketable securities	140	(1)	(432)	24
Total other comprehensive income (loss)	140	(1)	(432)	24
Total comprehensive loss	$ (15,923)	$ (17,428)	$ (56,716)	$ (51,820)