CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Statement [Abstract]
Revenues	$ 39,552	$ 57,800
Operating expenses:
Research and development	112,670	111,521
General and administrative	34,886	44,727
Impairment of long-lived assets	13,235	5,521
Total operating expenses	160,791	161,769
Loss from operations	(121,239)	(103,969)
Interest income	1,302	1,513
Other (expense) income, net	(3,563)	4,348
Loss before income taxes	(123,500)	(98,108)
Income tax benefit	(568)	(167)
Net loss	$ (122,932)	$ (97,941)
Basic net loss per share (in dollars per share)	$ (0.44)	$ (0.49)
Diluted net loss per share (in dollars per share)	$ (0.44)	$ (0.49)
Shares used in computing basic net loss per share (in shares)	280,193	201,699
Shares used in computing diluted net loss per share (in shares)	280,193	201,699