Stock-Based Compensation - Summarize Information about Stock Options (Detail) - USD ($)	9 Months Ended
Jun. 30, 2022
Number of Options Outstanding
Beginning balance (in shares)	3,456,239
Granted (in shares)	0
Cancelled (in shares)	(106,801)
Exercised (in shares)	(506,596)
Ending balance (in shares)	2,842,842
Number of Options Outstanding, Exercisable (in shares)	2,370,089
Weighted- Average Exercise Price Per Share
Beginning balance (in dollars per share)	$ 19.60
Granted (in dollars per share)	0
Cancelled (in dollars per share)	43.68
Exercised (in dollars per share)	8.45
Ending balance (in dollars per share)	20.60
Weighted-Average Exercise Price Per Share, Exercisable (in dollars per share)	$ 16.14
Weighted- Average Remaining Contractual Term	5 years 1 month 6 days
Weighted-Average Remaining Contractual Term, Exercisable	4 years 7 months 6 days
Aggregate Intrinsic Value	$ 55,434,252
Aggregate Intrinsic Value, Exercisable	$ 52,941,990

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.