Organization and Summary of Significant Accounting Policies - Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 13,162	$ 10,987	$ 10,681
Rich Data Corporation (RDC)
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 6,200	$ 6,200	$ 6,200