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Net Loss Per Common Share
 9 Months Ended
Sep. 30, 2022
Earnings Per Share [Abstract]  
Net Loss Per Common Share Net Loss Per Common Share
 
Basic net loss per common share is calculated by dividing net loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted net loss per common share is computed by dividing net loss attributable to common stockholders by the weighted-average number of common share equivalents outstanding for the period determined using the treasury stock method. The following outstanding common stock equivalents have been excluded from diluted net loss per common share because their inclusion would be anti-dilutive:
 
 Three Months Ended September 30,Nine Months Ended September 30,
 2022202120222021
Shares of common stock subject to outstanding options4,043,274 3,668,179 3,902,116 3,817,351 
Employee stock purchase plan39,177 14,445 40,094 16,686 
Restricted stock units2,114,223 1,246,888 1,929,696 1,011,466 
Total common stock equivalents6,196,674 4,929,512 5,871,906 4,845,503