Net Loss per Share - Antidilutive securities (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net Loss per Share
Antidilutive securities excluded from common stock	3,573,626	13,453,097
Redeemable convertible preferred stock
Net Loss per Share
Antidilutive securities excluded from common stock		11,788,435
Unvested restricted common stock
Net Loss per Share
Antidilutive securities excluded from common stock		11,537
Unvested shares from early exercises
Net Loss per Share
Antidilutive securities excluded from common stock	111,756	27,869
Stock options
Net Loss per Share
Antidilutive securities excluded from common stock	3,461,870	1,625,256