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Net Loss Per Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Summary of Shares Excluded from Computation of Diluted Net Loss Per Share
The following common stock participating securities as of December 31 were excluded from the computation of diluted net loss per share for the periods presented because their effect would have been anti-dilutive (in thousands):
202120202019
Options to purchase common stock2,271 3,379 4,610 
Restricted stock units1,344 1,574 1,681 
Common stock warrants471 508 1,116