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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of Stock Option Activity

The following table summarizes our stock option activity:

 

    Stock Options     Weighted Average Exercise Price  
Outstanding December 31, 2020     1,360     $ 106.00  
Outstanding March 31, 2021     1,360     $ 106.00  
Exercisable as of March 31, 2021     971     $ 106.00