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Share-Based Compensation - Schedule of BitAccess Plan Stock Option Activity (Detail) - $ / shares
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Employee Stock Option | Bit Access Plan [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Options - Beginning balance     106,938 43,780 106,938 106,938  
Options - Granted       0 39,600    
Options - Exercised       0 (68,058)    
Options - Forfeited         (33,600)    
Options - End balance 44,880     43,780 44,880 43,780 106,938
Options - Vested and exercisable 11,038     20,208 11,038    
Weighted-average exercise price - Beginning balance     $ 1.04 $ 2.86 $ 1.04 $ 1.04  
Weighted-average exercise price - Granted       0 2.86    
Weighted-average exercise price - Exercised       0 0    
Weighted-average exercise price - Forfeited         (2.86)    
Weighted-average exercise price - End balance $ 2.86     2.86 2.86 $ 2.86 $ 1.04
Weighted-average exercise price - Vested and exercisable $ 2.86     $ 2.86 $ 2.86    
Weighted-average remaining contractual term - Outstanding       7 years 10 months 6 days 8 years 11 months 4 days 8 years 7 months 6 days 8 years 10 months 9 days
Weighted-average remaining contractual term - Granted         9 years 9 months 3 days    
Weighted-average grant-date fair value - Outstanding       $ 3.09 $ 3.09 $ 1.21 $ 1.13
Weighted-average grant-date fair value - Granted       0 3.05    
Weighted-average grant-date fair value - Exercised       0 4.44    
Weighted-average grant-date fair value - Forfeited         (1.11)    
Weighted-average grant-date fair value - Vested and exercisable       3.1 $ 3.1    
Restricted Stock Units (RSUs) [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Weighted-average grant-date fair value - Vested and exercisable       $ 3.6      
Restricted Stock Units (RSUs) [Member] | Bit Access Plan [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]              
Restricted stock units - Beginning balance 25,641 57,834 81,142 0 81,142 81,142  
Restricted stock units - Exercised (25,641) (32,193) (23,308)        
Restricted stock units - End balance 0 25,641 57,834 0 0 0 81,142