Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2023

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, 2023
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
U.S. government bonds	$	27,092	$	—	$	—	$	27,092
Municipal securities	—		7,033		—		7,033
Commercial notes	—		62,755		—		62,755
Corporate debt securities	—		287,749		—		287,749
Certificate of deposits	—		—		—		—
Money market instruments	49,199		—		—		49,199

	September 30, 2022
	Level 1		Level 2		Level 3		Total
	(in thousands)
U.S. government bonds	$	1,973	$	—	$	—	$	1,973
Commercial notes	—		41,727		—		41,727
Corporate debt securities	—		271,333		—		271,333
Certificate of deposits	50,000		—		—		50,000
Money market instruments	39,262		—		—		39,262