Marketable Securities - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
	Dec. 31, 2020	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Marketable Securities [Abstract]
Marketable securities held		$ 0		$ 0
Proceeds from sale of marketable securities	$ 56,200,000	$ 0	$ 56,170,000