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Crypto Assets Held - Schedule of Crypto Assets Held At Fair Value (Details) $ in Thousands | Sep. 30, 2025 USD ($) crypto_unit | Dec. 31, 2024 USD ($) crypto_unit | Dec. 31, 2023 USD ($)
--- | --- | --- | ---
Crypto Asset, Holding [Line Items] |  |  |
Cost Basis | $ 321,843 | $ 142,214 |
Fair Value | $ 674,963 | $ 470,101 | $ 327,866
Bitcoin |  |  |
Crypto Asset, Holding [Line Items] |  |  |
Units (in unit) | crypto_unit | 5,302 | 4,414 |
Cost Basis | $ 263,746 | $ 117,005 |
Fair Value | $ 604,746 | $ 412,115 | 295,320
Ether |  |  |
Crypto Asset, Holding [Line Items] |  |  |
Units (in unit) | crypto_unit | 11,134 | 5,301 |
Cost Basis | $ 46,347 | $ 17,009 |
Fair Value | 46,164 | 17,562 | 25,718
Other crypto assets |  |  |
Crypto Asset, Holding [Line Items] |  |  |
Cost Basis | 11,750 | 8,200 |
Fair Value | $ 24,053 | $ 40,424 | $ 6,828

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