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Stock-Based Compensation - Stock Option Activity (Details) - 2023 and 2014 Plans - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares, Options Outstanding at beginning of the period 651,237,400    
Number of shares, Granted 25,000,000    
Number of shares, Forfeited (299,802,712)    
Number of shares, Expired (24,500,000)    
Number of shares, Options Outstanding at end of the period 351,934,688   651,237,400
Number of shares, Exercisable options at end of the period 263,101,355    
Weighted average exercise price, Outstanding at beginning of the period $ 0.01    
Weighted average exercise price, Forfeited 0.01    
Weighted average exercise price, Expired 0.02    
Weighted average exercise price, Outstanding at end of the period 0.01   $ 0.01
Options exercisable at end of the period, Weighted average exercise price $ 0.01    
Weighted average remaining contractual life, Options outstanding during the period (in years) 4 years 7 months 6 days   8 years 6 months
Weighted average remaining contractual term, Options exercisable at end of the period (in years) 3 years 2 months 12 days    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value per share of options granted $ 0.01 $ 0.01