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Income Taxes - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Feb. 28, 2025	Mar. 31, 2025	Mar. 31, 2024
Income Taxes [Line Items]
Income tax benefit		$ 1,278,000	$ 0
Biogen International GmbH | Licensing Agreements
Income Taxes [Line Items]
Upfront payment received	$ 165,000,000
Federal
Income Taxes [Line Items]
Income tax benefit		1,100,000
State
Income Taxes [Line Items]
Income tax benefit		$ 100,000

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Income taxes.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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