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FAIR VALUE MEASUREMENT - Measured at fair value on a recurring basis (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Risk free interest rate, minimum | 3.50% | 10.00% |
Risk free interest rate, maximum | 4.50% | 15.00% |
Financial instruments held, at fair value | $ 75,547,082 | $ 428,159,554 |
Long-term available-for-sale investments | 4,410,382 | 4,066,490 |
Fair value assets transferred from level 1 to level 2 | 0 | 0 |
Fair value assets transferred from level 2 to level 1 | 0 | 0 |
Fair value liabilities transferred from level 1 to level 2 | 0 | 0 |
Fair value liabilities transferred from level 2 to level 1 | 0 | 0 |
Fair value assets transferred into level 3 | 0 | 0 |
Fair value assets transferred out of level 3 | 0 | 0 |
Fair value liabilities transferred into level 3 | 0 | 0 |
Fair value liabilities transferred out of level 3 | 0 | 0 |
Impairment loss related to long-term available-for-sale securities | 0 | 0 | $ 472,605
Other Comprehensive Income (Loss) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Unrealized loss |  | 450,325 |
Unrealized gain | 343,892 |  |
Other Income |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Unrealized loss | 257,065 | 426,428 |
Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term available-for-sale investments | 4,410,382 | 4,066,490 |
Total | 83,980,646 | 438,654,300 |
Recurring | Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 18,153,978 | 6,423,924 |
Cash and cash equivalents | 4,023,182 | 6,428,256 |
Recurring | Bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 54,418,366 | 418,077,123 |
Recurring | Stocks |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 2,270,679 | 3,014,507 |
Recurring | Others |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 704,059 | 644,000 |
Recurring | Quoted prices in active markets for identical instruments (Level 1) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total | 64,107,383 | 430,798,845 |
Recurring | Quoted prices in active markets for identical instruments (Level 1) | Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 2,691,097 | 2,634,959 |
Cash and cash equivalents | 4,023,182 | 6,428,256 |
Recurring | Quoted prices in active markets for identical instruments (Level 1) | Bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 54,418,366 | 418,077,123 |
Recurring | Quoted prices in active markets for identical instruments (Level 1) | Stocks |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 2,270,679 | 3,014,507 |
Recurring | Quoted prices in active markets for identical instruments (Level 1) | Others |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 704,059 | 644,000 |
Recurring | Significant other observable inputs (Level 2) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total | 11,770,376 | 353,525 |
Recurring | Significant other observable inputs (Level 2) | Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | 11,770,376 | 353,525 |
Recurring | Significant unobservable inputs (level 3) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term available-for-sale investments | 4,410,382 | 4,066,490 |
Total | 8,102,887 | 7,501,930 |
Recurring | Significant unobservable inputs (level 3) | Funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Financial instruments held, at fair value | $ 3,692,505 | $ 3,435,440 |

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 940 -SubTopic 320 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479035/940-320-45-2 + Details
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