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Fair Value (Details) - Schedule of fair values of financial assets and liabilities, excluding financial instruments - USD ($) | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Aug. 31, 2019 | Dec. 31, 2018
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Fair Value (Details) - Schedule of fair values of financial assets and liabilities, excluding financial instruments [Line Items] |  |  |  |  |
Cash and cash equivalents | $ 3,426,467 | $ 6,388,978 |  |  | $ 3,116,209
Bank balances held on behalf of customers | 1,367,630 | 2,192,201 |  |  |
Receivables from broker-dealers and clearing organizations | 8,089,193 | 1,684,961 |  |  |
Short-term loans receivable | 2,239,378 | 1,637,310 |  |  |
Commissions receivable | 71,253 | 88,560 |  |  |
Other receivables | 724,708 | 166,064 |  |  |
Total assets | 15,918,629 | 12,158,074 |  |  |
Payables to customers | 5,221,270 | 3,853,693 |  |  |
Payable to broker-dealers | 3,845,740 |  |  |  |
Commissions payable | 39,180 | 29,439 |  |  |
Dividends payable |  | 385,901 |  |  |
Accrued expenses and other payables | 1,763,094 | 417,445 |  |  |
Short-term borrowings | 293,905 | 1,412,570 | $ 20,409,250 | $ 20,409,250 |
Short-term borrowings from related party |  | 128,415 |  |  |
Due to director | 149,522 |  |  |  |
Total Liabilities | 11,312,711 | 6,227,463 |  |  |
Estimated Fair Value [Member] |  |  |  |  |
Fair Value (Details) - Schedule of fair values of financial assets and liabilities, excluding financial instruments [Line Items] |  |  |  |  |
Cash and cash equivalents | 3,426,467 | 6,388,978 |  |  |
Bank balances held on behalf of customers | 1,367,630 | 2,192,201 |  |  |
Receivables from broker-dealers and clearing organizations | 8,089,193 | 1,684,961 |  |  |
Short-term loans receivable | 2,239,378 | 1,637,310 |  |  |
Commissions receivable | 71,253 | 88,560 |  |  |
Other receivables | 724,708 | 166,064 |  |  |
Total assets | 15,918,629 | 12,158,074 |  |  |
Payables to customers | 5,221,270 | 3,853,693 |  |  |
Payable to broker-dealers | 3,845,740 |  |  |  |
Commissions payable | 39,180 | 29,439 |  |  |
Dividends payable |  | 385,901 |  |  |
Accrued expenses and other payables | 1,763,094 | 417,445 |  |  |
Short-term borrowings | 293,905 | 1,412,570 |  |  |
Short-term borrowings from related party |  | 128,415 |  |  |
Due to director | 149,522 |  |  |  |
Total Liabilities | 11,312,711 | 6,227,463 |  |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |  |  |  |
Fair Value (Details) - Schedule of fair values of financial assets and liabilities, excluding financial instruments [Line Items] |  |  |  |  |
Cash and cash equivalents | 3,426,467 | 6,388,978 |  |  |
Bank balances held on behalf of customers | 1,367,630 | 2,192,201 |  |  |
Receivables from broker-dealers and clearing organizations |  |  |  |  |
Short-term loans receivable |  |  |  |  |
Commissions receivable |  |  |  |  |
Other receivables |  |  |  |  |
Total assets | 4,794,097 | 8,581,179 |  |  |
Payables to customers |  |  |  |  |
Payable to broker-dealers |  |  |  |  |
Commissions payable |  |  |  |  |
Dividends payable |  |  |  |  |
Accrued expenses and other payables |  |  |  |  |
Short-term borrowings |  |  |  |  |
Short-term borrowings from related party |  |  |  |  |
Due to director |  |  |  |  |
Total Liabilities |  |  |  |  |
Significant Observable Inputs (Level 2) [Member] |  |  |  |  |
Fair Value (Details) - Schedule of fair values of financial assets and liabilities, excluding financial instruments [Line Items] |  |  |  |  |
Cash and cash equivalents |  |  |  |  |
Bank balances held on behalf of customers |  |  |  |  |
Receivables from broker-dealers and clearing organizations | 8,089,193 | 1,684,961 |  |  |
Short-term loans receivable | 2,239,378 | 1,637,310 |  |  |
Commissions receivable | 71,253 | 88,560 |  |  |
Other receivables | 724,708 | 166,064 |  |  |
Total assets | 10,399,824 | 3,576,895 |  |  |
Payables to customers | 5,221,270 | 3,853,693 |  |  |
Payable to broker-dealers | 3,845,740 |  |  |  |
Commissions payable | 39,180 | 29,439 |  |  |
Dividends payable |  | 385,901 |  |  |
Accrued expenses and other payables | 1,763,094 | 417,445 |  |  |
Short-term borrowings | 293,905 | 1,412,570 |  |  |
Short-term borrowings from related party |  | 128,415 |  |  |
Due to director | 149,522 |  |  |  |
Total Liabilities | 11,312,711 | 6,227,463 |  |  |
Significant Unobservable Inputs (Level 3) [Member] |  |  |  |  |
Fair Value (Details) - Schedule of fair values of financial assets and liabilities, excluding financial instruments [Line Items] |  |  |  |  |
Cash and cash equivalents |  |  |  |  |
Bank balances held on behalf of customers |  |  |  |  |
Receivables from broker-dealers and clearing organizations |  |  |  |  |
Short-term loans receivable |  |  |  |  |
Commissions receivable |  |  |  |  |
Other receivables |  |  |  |  |
Total assets |  |  |  |  |
Payables to customers |  |  |  |  |
Payable to broker-dealers |  |  |  |  |
Commissions payable |  |  |  |  |
Accrued expenses and other payables |  |  |  |  |
Short-term borrowings |  |  |  |  |
Short-term borrowings from related party |  |  |  |  |
Due to director |  |  |  |  |
Total Liabilities |  |  |  |  |

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