Organization and Summary of Significant Accounting Policies - Recently Adopted Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest Expense	$ (9,972)	$ (22,177)	$ (22,472)
Basic earnings (loss) per share (in dollars per share)	$ 0.89	$ 0.15	$ (1.24)
Diluted earnings (loss) per share (in dollars per share)	$ 0.70	$ 0.15	$ (1.24)
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest Expense	$ 13,900
Basic earnings (loss) per share (in dollars per share)	$ 0.19
Diluted earnings (loss) per share (in dollars per share)	$ 0.01