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Basic and Diluted Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Summary of Number of Options, Restricted Stock Units
The following table presents the number of options, restricted stock units and restricted stock excluded from the calculation of diluted net loss per share attributable to common stockholders because they are anti-dilutive (in thousands):
 
    
June 30,
 
    
2021
    
2020
 
Options to purchase common stock
     15,666        12,134  
Restricted stock units
     3,795        1,030  
Restricted stock
     50        100  
    
 
 
    
 
 
 
Total
     19,511        13,264