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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Operating activities:      
Net Income (loss) $ 79,037,845 $ 82,594,360 $ 3,213,386
Adjustments to reconcile net income to net cash provided by operating activities      
Depreciation 1,102,014 850,375 262,184
Amortization 31,077    
Reduction in the carrying amount of operating lease right-of-use assets 829,069 926,678  
Loss on disposal of property and equipment 5,306 84,579  
Investment income (21,407) (54,824) (13,994)
Impairment loss 705,428 0  
Share-based compensation 26,690,970 43,939,447 60,805,483
Changes in operating assets and liabilities:      
Prepayments and other current assets (6,833,954) (6,646,354) (11,742,160)
Other assets (2,612,479)    
Amounts due to a related party 777,434    
Accounts payable 989,946 2,818,546 849,297
Deferred revenue 10,986,282 11,611,376 7,348,953
Accrued expenses and other current liabilities 8,856,672 8,794,349 4,069,530
Operating lease liabilities (996,099) (677,592)  
Net cash provided by operating activities 119,548,104 144,240,940 64,792,679
Investing activities:      
Purchase of property and equipment (1,571,070) (1,488,753) (1,029,654)
Purchase of intangible asset (1,359,547)    
Prepayments of purchase of property and equipment (13,393,876)    
Purchases of short-term investments (29,566,642) (20,972,246) (3,661,847)
Proceeds from maturity of short-term investments 6,424,215 18,870,732 4,451,035
Purchase of term deposits (20,000,000)    
Proceeds from maturity of term deposits     2,722,941
Payments of long-term investments (2,984,849) (1,768,455)  
Loans provided to a related party (145,370)    
Repayment of loans provided to a related party 141,086    
Loans provided to a third party (1,574,704)    
Repayment of loan provided to a third party 1,464,408    
Net cash provided by (used in) investing activities (62,566,349) (5,358,722) 2,482,475
Financing activities:      
Proceeds from exercise of share options 1,965,894 1,085,380  
Repurchase of shares (1,594,889) (25,419,808)  
Proceeds from Initial Public Offering, net of underwriting commissions and discounts of US$9,632,500     135,117,436
Cash contribution from ordinary shareholders     7,339
Payments of initial public offering costs   (226,537) (2,346,059)
Payments of dividends     (9,010,045)
Net cash provided by (used in) financing activities 371,005 (24,560,965) 123,768,671
Effect of foreign currency exchange rate changes on cash and cash equivalents (1,581,525) 281,067 536,835
Net increase in cash and cash equivalents 55,771,235 114,602,320 191,580,660
Cash and cash equivalents at the beginning of the year 351,485,602 236,883,282 45,302,622
Cash and cash equivalents at the end of the year 407,256,837 351,485,602 236,883,282
Supplemental cash flow information:      
Income taxes paid 2,350,510 1,758,448 849,773
Noncash investing and financing activities:      
Accrual of issuance costs in accrued expenses and other current liabilities     $ 226,537
Operating lease right-of-use assets acquired in operating lease $ 2,082,819 $ 2,159