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Earnings (loss) per share
6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Earnings (loss) per share Earnings (loss) per shareThe Company excluded the following potentially dilutive shares from diluted net loss per share as the effect would have been anti-dilutive for all periods presented:
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2021202020212020
Outstanding stock options7,706,353 5,613,337 7,706,353 5,613,337 
Restricted stock units173,500 131,000 173,500 131,000 
Shares issuable under 2020 ESPP29,102 18,011 29,102 18,011 
 7,908,955 5,762,348 7,908,955 5,762,348