Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements for Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents information about the Company’s assets and liabilities measured at fair value on a recurring basis, and indicates the fair value hierarchy of the valuation techniques utilized by the Company:

	June 30, 2024
	Level 1		Level 2		Level 3		Total
	(in thousands)
Available-for-sale securities
U.S. government bonds	$	—	$	80,946	$	—	$	80,946
Commercial notes	—		114,616		—		114,616
Corporate debt securities	—		171,710		—		171,710
Total available-for-sale securities	—		367,272		—		367,272
Cash equivalents
Money market instruments	29,495		—		—		29,495
Commercial notes	—		4,986		—		4,986
Total cash equivalents	29,495		4,986		—		34,481
Total financial assets	$	29,495	$	372,258	$	—	$	401,753

	September 30, 2023
	Level 1		Level 2		Level 3		Total
	(in thousands)
Available-for-sale securities
U.S. government bonds	$	31,553	$	—	$	—	$	31,553
Municipal securities	—		7,093		—		7,093
Commercial notes	—		22,205		—		22,205
Corporate debt securities	—		231,884		—		231,884
Total available-for-sale securities	31,553		261,182		—		292,735
Cash equivalents
Money market instruments	39,733		—		—		39,733
Total cash equivalents	39,733		—		—		39,733
Total financial assets	$	71,286	$	261,182	$	—	$	332,468