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Equity, Stock Options (Details) - shares
12 Months Ended
May 19, 2021
Dec. 31, 2021
2017 Option Plan    
Stock-Based Compensation    
Additional shares available for the granting of stock options 40,000,000  
Number of shares originally authorized for issuance of stock options under stock option plan   60,000,000
Remaining shares available for the granting of stock options under plan   43,277,741
Options ratable vesting period   5 years
Options exercisable period   10 years
2009 Employee Option Plan    
Stock-Based Compensation    
Additional shares available for the granting of stock options   0
Options ratable vesting period   5 years
Options exercisable period   10 years