Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses:
Research and development	$ 10,138	$ 6,818	$ 17,786	$ 15,855
General and administrative	7,477	3,712	14,147	7,499
Total operating expenses	17,615	10,530	31,933	23,354
Loss from operations	(17,615)	(10,530)	(31,933)	(23,354)
Other income (expenses):
Interest income	270	13	367	30
Interest expense	0	0	0	(10)
Other income (expense)	100	(142)	213	(118)
Total other income (expense), net	370	(129)	580	(98)
Loss from continuing operations	(17,245)	(10,659)	(31,353)	(23,452)
Loss on investment in joint venture	338	468	728	950
Net loss	$ (17,583)	$ (11,127)	$ (32,081)	$ (24,402)
Net loss per common share, basic	$ (0.57)	$ (0.49)	$ (1.05)	$ (1.09)
Net loss per common share, diluted	$ (0.57)	$ (0.49)	$ (1.05)	$ (1.09)
Weighted average number of common shares outstanding, basic	30,588,931	22,559,706	30,453,913	22,309,203
Weighted average number of common shares outstanding, diluted	30,588,931	22,559,706	30,453,913	22,309,203
Net unrealized loss on marketable securities	$ 249	$ 0	$ 371	$ 0
Other comprehensive loss	(249)	0	(371)	0
Comprehensive loss	$ (17,832)	$ (11,127)	$ (32,452)	$ (24,402)