Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Revenues	$ 361	$ 640
Operating expenses:
Research and development	76,240	53,341
General and administrative	35,526	20,828
Total operating expenses	111,766	74,169
Loss from operations	(111,405)	(73,529)
Other income (expense):
Interest income	14,834	7,320
Other expense, net	(203)	(251)
Total other income, net	14,631	7,069
Loss before equity method investment	(96,774)	(66,460)
Loss on equity method investment	0	(470)
Net loss	$ (96,774)	$ (66,930)
Net loss per share:
Net loss per share - basic	$ (1.04)	$ (0.93)
Net loss per share - diluted	$ (1.04)	$ (0.93)
Weighted average shares - basic	93,102	72,289
Weighted average shares - diluted	93,102	72,289
Other comprehensive income (loss):
Unrealized gain (loss) on investment securities	$ 1,033	$ (827)
Unrealized gain on foreign currency	6	0
Total other comprehensive income (loss)	1,039	(827)
Comprehensive loss	$ (95,735)	$ (67,757)