Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating expenses:
Research and development	$ 13,130	$ 10,138	$ 24,332	$ 17,786
General and administrative	6,953	7,477	14,125	14,147
Total operating expenses	20,083	17,615	38,457	31,933
Loss from operations	(20,083)	(17,615)	(38,457)	(31,933)
Other income:
Interest income	1,608	270	3,154	367
Other income	62	100	135	213
Total other income, net	1,670	370	3,289	580
Loss from continuing operations	(18,413)	(17,245)	(35,168)	(31,353)
Loss on investment in joint venture	217	338	780	728
Net loss	$ (18,630)	$ (17,583)	$ (35,948)	$ (32,081)
Net loss per common share, basic (in dollars per share)	$ (0.46)	$ (0.57)	$ (0.89)	$ (1.05)
Net loss per common share, diluted (in dollars per share)	$ (0.46)	$ (0.57)	$ (0.89)	$ (1.05)
Weighted average number of common shares outstanding, basic (in shares)	40,363,902	30,588,931	40,306,715	30,453,913
Weighted average number of common shares outstanding, diluted (in shares)	40,363,902	30,588,931	40,306,715	30,453,913
Other comprehensive loss:
Net unrealized loss on marketable securities	$ (211)	$ (249)	$ (58)	$ (371)
Other comprehensive loss	(211)	(249)	(58)	(371)
Comprehensive loss	$ (18,841)	$ (17,832)	$ (36,006)	$ (32,452)