Common Stock - Common Stock Reserved for Issuance Upon Conversion of Outstanding Convertible Preferred Stock and Exercise of Stock Options (Details)	Sep. 30, 2021 shares
Schedule Of Common Stock Reserved For Future Issuance [Line Items]
Common stock reserved for future issuance	28,418,977
Series A Convertible Preferred Stock
Schedule Of Common Stock Reserved For Future Issuance [Line Items]
Common stock reserved for future issuance	3,573,659
Series B Convertible Preferred Stock
Schedule Of Common Stock Reserved For Future Issuance [Line Items]
Common stock reserved for future issuance	16,482,486
Unvested Restricted Stock Options
Schedule Of Common Stock Reserved For Future Issuance [Line Items]
Common stock reserved for future issuance	554,724
Stock Options Available for Issuance
Schedule Of Common Stock Reserved For Future Issuance [Line Items]
Common stock reserved for future issuance	3,852,807
Stock Options Outstanding
Schedule Of Common Stock Reserved For Future Issuance [Line Items]
Common stock reserved for future issuance	3,530,706
Employee Stock Purchase Plan
Schedule Of Common Stock Reserved For Future Issuance [Line Items]
Common stock reserved for future issuance	424,595