Investments (Details) - Investments [Member] - Coinshares International Limited [Member] - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Investments (Details) [Line Items] | |||
| Net realized gains related to sale or disposal of investments | $ 0.1 | $ 2.7 | $ 1.3 |
| Net unrealized (loss)/gain related to investments | $ (1.7) | $ (1.7) | $ 14.7 |