Fair Value Measures - Summary of Unrealized Losses Recognized Related to Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Net loss recognized during the period on equity securities	$ 23	$ 20	$ 135	$ 280
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	$ 23	$ 20	$ 135	$ 280