Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			6 Months Ended
	Oct. 02, 2019	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Class Of Stock [Line Items]
Common stock reserved for issuance	6,350,000
Common stock, par value	$ 0.01	$ 0.01			$ 0.01		$ 0.01
Increase in shares available for issuance, description	The shares available for issuance will automatically increase on January 1st of each year, by the lesser of (A) three percent (3%) of the number of shares of Common Stock outstanding as of the close of business on the immediately preceding December 31st; and (B) the number of shares of Common Stock determined by the Board on or prior to such date for such year.
Increase in shares available for issuance expressed as percentage of number of shares of common stock outstanding	3.00%
Stock-based compensation		$ 10,926		$ 14,144	$ 16,767	$ 27,469
Due to the Resignation of Former CEO
Class Of Stock [Line Items]
Stock-based compensation			$ 4,000
Due to the Resignation of Former CFO and General Counsel
Class Of Stock [Line Items]
Stock-based compensation		2,400
Net of Forfeitures, Due to the Resignation of Former CEO
Class Of Stock [Line Items]
Stock-based compensation			$ 5,000
Net of Forfeitures, Due to the Resignation of Former CFO and General Counsel
Class Of Stock [Line Items]
Stock-based compensation		$ 200
2019 Equity Incentive Plan
Class Of Stock [Line Items]
Common stock reserved for issuance	5,300,000
2019 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Common stock reserved for issuance	1,050,000