Fair Value Measures - Summary of Unrealized Losses Recognized Related to Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Net loss (gain) recognized during the period on equity securities	$ 38	$ (96)	$ 173	$ 184
Less net loss recognized during the period on equity securities sold during the period	0	0	0	0
Unrealized loss (gain) recognized during the reporting period on equity securities still held at the reporting date	$ 38	$ (96)	$ 173	$ 184