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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Other Commitments [Line Items]
Impairment of intangible assets	$ 0	$ 0
Intangible assets, net	110,204		$ 65,490
Amortization of intangible assets	5,286	$ 0
Neuren Pharmaceuticals Limited [Member] | License Agreements [Member]
Other Commitments [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of 2023	7,000
Amortization of intangible assets	5,300
Finite-Lived Intangible Assets, Amortization Expense, Subsequent year	9,400
FDA Approval Of DAYBUE [Member] | Neuren Pharmaceuticals Limited [Member] | License Agreements [Member]
Other Commitments [Line Items]
Intangible assets, net	$ 119,600

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