Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 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:

	December 31, 2023
	Level 1		Level 2		Level 3		Total
	(in thousands)
Available-for-sale debt securities
U.S. government bonds	$	10,859	$	—	$	—	$	10,859
Municipal securities	—		7,153		—		7,153
Commercial notes	—		—		—		—
Corporate debt securities	—		144,052		—		144,052
Total available-for sale debt securities	10,859		151,205		—		162,064
Money market instruments	6,489		—		—		6,489
Total financial assets	$	17,348	$	151,205	$	—	$	168,553

	September 30, 2023
	Level 1		Level 2		Level 3		Total
	(in thousands)
Available-for-sale debt 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 debt securities	31,553		261,182		—		292,735
Money market instruments	347		—		—		347
Total financial assets	$	31,900	$	261,182	$	—	$	293,082