Fair Value Measures - Summary of Unrealized Losses Recognized Related to Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Fair Value Disclosures [Abstract]
Net losses recognized during the period on equity securities	$ 36	$ 53	$ 61	$ 46
Less: net losses recognized during the period on equity securities sold during the period	0	0	0	0
Unrealized losses recognized during the reporting period on equity securities still held at the reporting date	$ 36	$ 53	$ 61	$ 46