Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues	$ 0	$ 0
Operating expenses:
Research and development	11,008	12,555
General and administrative	9,529	3,690
Total operating expenses	20,537	16,245
Loss from operations	(20,537)	(16,245)
Other income (expense):
Amortization of financing costs	(28)	(12)
Interest income, net	1,034	154
Total other income, net	1,006	142
Net loss	(19,531)	(16,103)
Other comprehensive loss, net of tax:
Unrealized gain (loss) on securities	501	(893)
Foreign currency translation gain (loss)	(17)	31
Comprehensive loss	$ (19,047)	$ (16,965)
Basic net loss per common share	$ (0.25)	$ (0.21)
Weighted-average shares used to compute basic net loss per share	78,351,826	77,413,141
Diluted net loss per common share	$ (0.25)	$ (0.21)
Weighted-average shares used to compute diluted net loss per share	78,351,826	77,413,141