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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

X
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