Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues [Abstract]
Total revenue	$ 0	$ 0	$ 1,300,000	$ 100,000
Operating expenses:
Research and development	28,535,000	38,893,000	87,679,000	170,376,000
General and administrative	5,277,000	7,904,000	17,723,000	111,244,000
Total operating expenses	33,812,000	46,797,000	105,402,000	281,620,000
Loss from operations	(33,812,000)	(46,797,000)	(104,102,000)	(281,520,000)
Other income (expense):
Gain related to transaction with Acquirer	0	0	0	2,021,498,000
Interest expense	(3,181,000)	0	(9,011,000)	(13,491,000)
Interest income	1,783,000	2,892,000	6,236,000	8,937,000
Other income (expense), net	(46,000)	41,000	(342,000)	15,000
Total other income (expense)	(1,444,000)	2,933,000	(3,117,000)	2,016,959,000
Income (loss) before income tax expense	(35,256,000)	(43,864,000)	(107,219,000)	1,735,439,000
Provision for income taxes	0	0	2,000	2,000
Net income (loss)	$ (35,256,000)	$ (43,864,000)	$ (107,221,000)	$ 1,735,437,000
Earnings (loss) per share
Basic (in dollars per share)	$ (2.28)	$ (2.84)	$ (6.93)	$ 119.04
Diluted (in dollars per share)	$ (2.28)	$ (2.84)	$ (6.93)	$ 117.09
Shares used in computing earnings (loss) per share
Basic (in shares)	15,478	15,468	15,471	14,578
Diluted (in shares)	15,478	15,468	15,471	14,821
License fee revenue
Revenues [Abstract]
Total revenue	$ 0	$ 0	$ 1,300,000	$ 100,000