Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenues	$ 640	$ 2,679
Operating expenses:
Research and development	53,341	38,468
General and administrative	20,828	12,189
Total operating expenses	74,169	50,657
Loss from operations	(73,529)	(47,978)
Other income (expense):
Interest income	7,320	2,038
Other expense, net	(251)	(55)
Total other income, net	7,069	1,983
Loss before equity method investment	(66,460)	(45,995)
Loss on equity method investment	(470)	0
Net loss	$ (66,930)	$ (45,995)
Net loss per share:
Net loss per share - basic	$ (0.93)	$ (0.85)
Net loss per share - diluted	$ (0.93)	$ (0.85)
Weighted average shares - basic	72,289	53,908
Weighted average shares - diluted	72,289	53,908
Other comprehensive income (loss):
Unrealized gain (loss) on investment securities	$ (827)	$ 1,417
Comprehensive loss	$ (67,757)	$ (44,578)