Fair Value Measures and Disclosures - Summary of Unrealized Losses Recognized Related to Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Net losses recognized during the period on equity securities	$ 20	$ 0	$ 280	$ 0
Less net losses recognized during the period on equity securities sold during the period	0		0
Unrealized losses recognized during the reporting period on equity securities still held at the reporting date	$ 20		$ 280