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Net Loss Per Share
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Net Loss Per Share Net Loss Per Share
The following outstanding potentially dilutive shares have been excluded from the calculation of diluted net loss per share due to their anti-dilutive effect:
Three Months Ended March 31,
20212020
Stock options to purchase common stock3,560,541 2,399,195 
Unvested restricted stock units— 525,177 
Convertible promissory notes— 2,378,753 
Total3,560,541 5,303,125