Stock Based Compensation Expense - Summary of Non Vested Options (Details)	Sep. 30, 2021 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options Non-vested as of September 30, 2021 | shares	1,133,123
Number of Options Early exercised unvested as of September 30, 2021 | shares	205
Weighted- Average Fair Value Non-vested as of September 30, 2021 | $ / shares	$ 6.10
Weighted- Average Fair Value Early exercised unvested as of September 30, 2021 | $ / shares	$ 3.31