Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2023

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, 2023		September 30, 2023		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
2.89% promissory note receivable due April 2024	$	1,251	$	1,251	$	—	$	—	$	1,251
12.00% promissory note receivable from Founders	16,500		16,500		—		—		16,500
Investments in unconsolidated affiliate	10,987		35,998		35,998		—		—
Financial liabilities:
2024 Convertible Notes	$	34,265	$	35,765	$	—	$	35,765	$	—
2025 Convertible Notes	102,563		96,137		—		96,137		—
2029 Convertible Notes	223,284		224,112		—		224,112		—

	Carrying Value		Estimated Fair Value
	September 30, 2022		September 30, 2022		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
2.89% promissory note receivable due April 2024	$	1,215	$	1,215	$	—	$	—	$	1,215
Investments in unconsolidated affiliate	37,733		40,279		40,279		—		—
Financial liabilities:
2024 Convertible Notes	$	142,575	$	157,727	$	—	$	157,727	$	—
2025 Convertible Notes	170,328		147,488		—		147,488		—