INVESTMENTS - Schedule of Activities Involving the Company’s Digital Assets Held as Collateral and Held For Sale (Details) - USD ($) |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Crypto Asset [Roll Forward] | ||||
| Balance at Beginning Balance | $ 23,127,000 | $ 5,865,000 | $ 5,865,000 | |
| Impairment of digital assets | 0 | 5,851,000 | 5,859,000 | $ 572,000 |
| Balance at End of Period | 25,169,000 | 23,127,000 | 5,865,000 | |
| Held as Collateral | ||||
| Crypto Asset [Roll Forward] | ||||
| Balance at Beginning Balance | 64,439,000 | 0 | 0 | 2,025,000 |
| Purchases | 0 | 0 | 0 | 0 |
| Sales | 0 | 0 | 0 | |
| Collateral received | 55,946,000 | 35,941,000 | 72,512,000 | |
| Collateral returned | (44,597,000) | (3,057,000) | (8,073,000) | (2,025,000) |
| Gains | 0 | 0 | 0 | 0 |
| Distributions from Fund I | 0 | 0 | 0 | |
| Change in fair value | 9,228,000 | 0 | 0 | 0 |
| Impairment of digital assets | 0 | 0 | 0 | |
| Balance at End of Period | 85,016,000 | 32,884,000 | 64,439,000 | 0 |
| Held for Sale | ||||
| Crypto Asset [Roll Forward] | ||||
| Balance at Beginning Balance | 23,127,000 | 5,865,000 | 5,865,000 | 931,000 |
| Purchases | 9,938,000 | 25,777,000 | 26,785,000 | 817,000 |
| Sales | (12,634,000) | (10,842,000) | (16,092,000) | |
| Collateral received | 0 | 0 | 0 | |
| Collateral returned | 0 | 0 | 0 | 0 |
| Gains | 6,052,000 | 1,176,000 | 2,471,000 | 4,474,000 |
| Distributions from Fund I | 1,759,000 | 240,000 | 547,000 | |
| Change in fair value | (3,073,000) | 5,889,000 | 7,910,000 | 215,000 |
| Impairment of digital assets | (5,851,000) | (5,859,000) | (572,000) | |
| Balance at End of Period | $ 25,169,000 | $ 22,254,000 | $ 23,127,000 | $ 5,865,000 |