Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Not Measured at Fair Value in the Consolidated Balance Sheet

The tables below present our financial assets and liabilities that were not measured at fair value:

	Carrying Value		Estimated Fair Value
	September 30, 2025		September 30, 2025		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
Promissory note receivable from Founders	$	24,369	$	24,369	$	—	$	—	$	24,369
Investments in unconsolidated affiliates	18,123		59,729		58,573		—		1,156
Financial liabilities:
2029 Convertible Notes	$	225,258	$	422,931	$	—	$	422,931	$	—
2032 Senior Notes	292,818		320,734		—		320,734		—

	Carrying Value		Estimated Fair Value
	September 30, 2024		September 30, 2024		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
Promissory note receivable from Founders	$	15,722	$	15,722	$	—	$	—	$	15,722
Investments in unconsolidated affiliate	13,329		42,496		41,646		—		850
Financial liabilities:
2025 Convertible Notes	$	103,072	$	100,401	$	—	$	100,401	$	—
2029 Convertible Notes	224,256		273,700		—		273,700		—