v3.25.3

Summary of Significant Accounting Policies (Details) - USD ($)				3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 01, 2025	Feb. 27, 2025	Aug. 30, 2023	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Fair value				$ 175,900,000		$ 175,900,000		$ 41,700,000
Unrealized gain on investments						119,000		$ 18,000
Debt securities mature within one year				145,100,000		145,100,000
Debt securities mature within year one through five				30,900,000		30,900,000
Estimated proceeds from sale of priority review voucher		$ 150,000,000.0
Proceeds from sale of PRV	$ 148,300,000					150,000,000	$ 0
Inventory write-down				$ 0	$ 2,000,000.0	$ 11,681,000	$ 5,244,000
Aquestive Therapeutics \| License \| AZSTARYS License Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty percentage						10.00%
Acer and Relief Therapeutics SA \| License \| Relief License Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Royalty percentage			10.00%
Contractual obligation			$ 45,000,000.0
Acer and Relief Therapeutics SA \| License \| Relief License Agreement \| Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contractual obligation			$ 56,500,000

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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ZEVRA THERAPEUTICS, INC. 10-Q