Summary of Significant Accounting Policies (Details)			1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 11, 2024 USD ($)	Apr. 30, 2020 USD ($)	Apr. 30, 2020	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Policies
Net Income (Loss)				$ (87,544,000)	$ (31,592,000)	$ (255,418,000)	$ (136,655,000)
Accumulated deficit				2,823,280,000		2,823,280,000		$ 2,567,862,000
Cash, cash equivalents and restricted cash				1,041,438,000	$ 892,844,000	1,041,438,000	$ 892,844,000	945,587,000	$ 642,095,000
Marketable securities				1,000,000		1,000,000		22,689,000
Short-term Credit Line, outstanding balance				80,341,000		80,341,000		$ 80,362,000
Collateral amount				150,000,000		150,000,000
Remaining borrowing capacity				20,000,000		20,000,000
Convertible notes
Policies
Per annum interest rate (as a percent)	2.25%		2.25%
Percentage of principal amount converted	100.00%
Convertible notes payable	$ 287,400,000
Convertible to shares of common stock	7,500,000	7,411,704
Proceeds from notes payable	$ 100,000
Line Of Credit-UBS
Policies
Short-term Credit Line, outstanding balance				80,300,000		80,300,000
Collateral amount				150,000,000		150,000,000
Remaining borrowing capacity				$ 20,000,000		$ 20,000,000