Net Loss per Share - Antidilutive Securities (Details) - shares
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Diluted net loss per share attributable to common stockholders    
Antidilutive securities excluded from computation of of diluted weighted average shares outstanding 20,616,394 18,141,571
Unvested restricted common stock    
Diluted net loss per share attributable to common stockholders    
Antidilutive securities excluded from computation of of diluted weighted average shares outstanding 1,188,074 724,854
Stock options to purchase common stock    
Diluted net loss per share attributable to common stockholders    
Antidilutive securities excluded from computation of of diluted weighted average shares outstanding 19,428,320 17,416,717