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Net Loss per Share
12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Net Loss per Share Net Loss per ShareThe following common stock equivalents outstanding at the end of the periods presented were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect:
As of December 31,
20212020
(In thousands)
Stock options13,288 10,432 
Restricted stock units2,126 540 
ESPP148 26 
15,562 10,998