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Fair Value Measurements - Summary of Significant Inputs which the Fair Value Measurements Associated with Convertible Note (Details) - Convertible Notes [Member] | Sep. 30, 2025 | Dec. 31, 2024
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Risk-free rate (continuously compounded) [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 3.64 | 0
Fold volatility (annual) [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 99.71 | 0
Bitcoin volatility (annual) [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 56.87 | 0
Note term [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 4.43 | 0
Fold stock price [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 3.86 | 0
Bitoin price [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 114,056.09 | 0
Correlation (Fold and Bitcoin) [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 0.4062 | 0
Conversion price [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 12.5 | 0
Dividend yield (annual) [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Convertible note measurement input method | 0 | 0

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