Marketable Securities (Tables)

9 Months Ended

Jun. 30, 2026

Investments, Debt and Equity Securities [Abstract]

Schedule of Reconciliation of Marketable Securities

The following is a summary of the amortized cost and the fair value, including accrued interest receivable as well as unrealized gains (losses) on the Company’s short-term and long-term marketable securities as of June 30, 2026 and September 30, 2025 (in thousands):


	Amortized Cost		Gross Unrealized Losses		Gross Unrealized Gains		Fair Value
June 30, 2026:
U.S. Treasury securities and obligations of U.S. government agencies	$	244,688	$	(853)	$	2	$	243,837
Bank certificates of deposit	1,253		(1)		—		1,252
Corporate securities	72,907		(468)		—		72,439
Municipal securities	14,722		(28)		8		14,702
	$	333,570	$	(1,350)	$	10	$	332,230
September 30, 2025:
U.S. Treasury securities and obligations of U.S. government agencies	$	245,691	$	(94)	$	168	$	245,765
Bank certificates of deposit	1,640		—		1		1,641
Corporate securities	4,199		—		—		4,199
Municipal securities	11,048		—		69		11,117
	$	262,578	$	(94)	$	238	$	262,722

Schedule of Contractual Maturity

The amortized cost and fair value of the marketable securities by contractual maturities as of June 30, 2026 are presented below (in thousands):


	Amortized Cost		Fair Value
Due in one year or less	$	136,293	$	136,143
Due after one year through five years	192,988		191,798
Due after ten years	4,289		4,289
Total marketable securities	$	333,570	$	332,230