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Agreements - Summary of Total Purchase Price Allocated to Acquired Assets (Detail) - U.S. Rights for FYCOMPA [Member] $ in Thousands	1 Months Ended
	Jan. 31, 2023 USD ($)
Asset Acquisition [Line Items]
Inventory	$ 4,100
Prepaid expenses and other current assets (samples)	130
Prepaid commercialization expenses	1,576
Property and equipment, net	433
License and acquired intangibles for FYCOMPA	158,143
Accrued preclinical and clinical trial expenses	(174)
Total purchase consideration	$ 164,208

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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