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Investments - Schedule of Net Investment Gain (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Realized gain from long-term investments: |  |  |
Realized gain from long-term investments | $ 1,382,934 | $ 336,241 | $ 330,552
Trading securities [Member] |  |  |
Gain (loss) from sales of short-term investments: |  |  |
Gain (loss) from sales of short-term investments | 51,371 | (2,098) | 31,097
Unrealized gain from short-term investments: |  |  |
Unrealized gain from short-term investments | 122,337 | 87,513 | 49,245
Held-to-maturity securities [Member] |  |  |
Gain (loss) from sales of short-term investments: |  |  |
Gain (loss) from sales of short-term investments | 1,209,226 | 250,826 | 195,415
Realized gain from long-term investments: |  |  |
Realized gain from long-term investments |  |  | $ 54,795

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