Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Acquisition by Zevra - Additional Information (Details) - shares	Nov. 17, 2023	Aug. 30, 2023
Subsequent Event
Business Acquisition [Line Items]
Merger completed date	Nov. 17, 2023
Merger Agreement [Member] \| Zevra Therapeutics Inc [Member]
Business Acquisition [Line Items]
Number of shares entitled to receive		0.121