Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

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

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

	Carrying Value		Estimated Fair Value
	March 31, 2023		March 31, 2023		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
2.89% promissory note receivable due April 2024	$	1,233	$	1,233	$	—	$	—	$	1,233
12.00% promissory note receivable from Founders	15,600		15,600		—		—		15,600
Investments in unconsolidated affiliates	10,681		42,917		42,917		—		—
Other investments	39,220		39,220		—		—		39,220
Financial liabilities:
2024 Convertible Notes	$	34,184	$	34,389	$	—	$	34,389	$	—
2025 Convertible Notes	102,312		94,690		—		94,690		—
2029 Convertible Notes	222,791		221,529		—		221,529		—

	Carrying Value		Estimated Fair Value
	March 31, 2022		March 31, 2022		Fair Value Measurement Using
(in thousands)					Level 1		Level 2		Level 3
Financial assets:
2.89% promissory note receivable due April 2024	$	1,198	$	1,198	$	—	$	—	$	1,198
Investments in unconsolidated affiliates	42,002		51,502		44,529		—		6,973
Other investments	18,000		18,000		—		—		18,000
Financial liabilities:
2024 Convertible Notes	$	142,248	$	141,594	$	—	$	141,594	$	—
2025 Convertible Notes	169,920		153,525		—		153,525		—

	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 affiliates	37,733		40,279		40,279		—		—
Other investments	24,220		24,220		—		—		24,220
Financial liabilities:
2024 Convertible Notes	$	142,575	$	157,727	$	—	$	157,727	$	—
2025 Convertible Notes	170,328		147,488		—		147,488		—