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Net Loss Per Share Attributable to Common Stockholders (Tables)
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Earnings Per Share [Abstract]    
Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share
 
    
March 31,
 
    
2022
    
2021
 
Redeemable convertible preferred stock
            22,359,669  
Options to purchase common stock
     8,113,589        2,871,594  
Unvested shares of restricted common stock from early exercises
     17,820        34,647  
Restricted stock units
     702,663         
Restricted stock units—executive officer
     952,804         
  
 
 
    
 
 
 
Total
     9,786,876        25,265,910  
  
 
 
    
 
 
 
 
    
December 31,
 
    
2021
    
2020
 
Redeemable convertible preferred stock
     24,785,564        14,388,857  
Options to purchase common stock
     5,598,073        1,910,310  
Unvested shares of restricted common stock from early exercises
     757        41,834  
Restricted stock units
     952,804         
  
 
 
    
 
 
 
Total
     31,337,198        16,341,001