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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Subsequent Events - Additional Information (Details) - USD ($)	Aug. 30, 2023	Oct. 31, 2023
Bridge Loan Agreement and Security Agreement
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity	$ 6,500,000
Bridge Loan Agreement and Security Agreement \| Amendment to Bridge Loan Agreement
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity	$ 16,500,000
Merger Agreement \| Zevra Therapeutics, Inc
Subsequent Event [Line Items]
Number of shares entitled to receive	0.121
Subsequent Event \| Bridge Loan Agreement and Security Agreement \| Amendment to Bridge Loan Agreement
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity		$ 18,000,000