Organization and Summary of Significant Accounting Policies - Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 10,987	$ 37,733
Cash Converters International Limited
Schedule of Equity Method Investments [Line Items]
Income from investment, period of lag	3 months
Rich Data Corporation (RDC)
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 6,200