Warrants - (Detail) - $ / shares			1 Months Ended
	Mar. 28, 2016	Dec. 22, 2015	Nov. 30, 2020	Oct. 31, 2020	Mar. 31, 2022	Sep. 30, 2020
Warrants and Rights Note Disclosure [Abstract]
Class of warrants or rights number of warrants issued during the period (in shares)	7,531	18,854
Class of warrants or rights outstanding (in shares)					0	26,385
Number of warrants exercised (in shares)			7,531	18,854
Exercise price per share (in usd per share)			$ 21.24	$ 14.85
Common stock issued for cashless exercise (in shares)			6,041	16,051