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Marketable Securities (Tables)

9 Months Ended

Jun. 30, 2025

Investments, Debt and Equity Securities [Abstract]

Fair Value of Available-for-Sale Marketable Securities by Type of Security

As of June 30, 2025 and September 30, 2024, the fair value of available-for-sale marketable securities, by type of security, was as follows:

		June 30, 2025
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Credit Losses				Fair Value
		(in thousands)
U.S. Treasury notes		$	159,317			$	41			$	(59	)		$	—			$	159,299
		$	159,317			$	41			$	(59	)		$	—			$	159,299

		September 30, 2024
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Credit Losses				Fair Value
		(in thousands)
U.S. Treasury notes		$	210,267			$	686			$	—			$	—			$	210,953
		$	210,267			$	686			$	—			$	—			$	210,953

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- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

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