Organization and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest expense	$ 2,693	$ 5,569	$ 7,651	$ 16,542
Basic earnings (loss) per common share (in dollars per share)	$ 0.22	$ (0.05)	$ 0.76	$ 0.13
Diluted earnings per common share (in dollars per share)	$ 0.17	$ (0.05)	$ 0.59	$ 0.13
Accounting Standards Update 2020-06 | Restatement Adjustment Member
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest expense	$ (3,500)		$ (10,300)
Basic earnings (loss) per common share (in dollars per share)	$ 0.05		$ 0.14
Diluted earnings per common share (in dollars per share)			$ 0.02