Fair Value Measures - Summary of Unrealized Losses Recognized Related to Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Net loss recognized during the period on equity securities	$ 27	$ 38	$ 73	$ 173
Less net loss recognized during the period on equity securities sold during the period	0	0	0	0
Unrealized loss recognized during the reporting period on equity securities still held at the reporting date	$ 27	$ 38	$ 73	$ 173