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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating activities:      
Net Income $ 82,594,360 $ 3,213,386 $ 28,924,803
Adjustments to reconcile net income to net cash provided by operating activities      
Depreciation 850,375 262,184 173,610
Reduction in the carrying amount of operating lease right-of-use assets 926,678    
Loss on disposal of property and equipment 84,579    
Investment income (54,824) (13,994) (27,568)
Share-based compensation 43,939,447 60,805,483  
Changes in operating assets and liabilities:      
Prepayments and other current assets (6,646,354) (11,742,160) (1,635,147)
Accounts payable 2,818,546 849,297 291,842
Deferred revenue 11,611,376 7,348,953 2,571,456
Accrued expenses and other current liabilities 8,794,349 4,069,530 981,988
Operating lease liabilities (677,592)    
Net cash provided by operating activities 144,240,940 64,792,679 31,280,984
Investing activities:      
Purchase of property and equipment (1,488,753) (1,029,654) (427,933)
Purchases of short-term investments (20,972,246) (3,661,847) (5,943,321)
Proceeds from maturity of short-term investments 18,870,732 4,451,035 4,956,176
Purchase of term deposits     (7,722,941)
Proceeds from maturity of term deposits   2,722,941 6,304,631
Payments of long-term investments (1,768,455)    
Net cash (used in) provided by investing activities (5,358,722) 2,482,475 (2,833,388)
Financing activities:      
Proceeds from exercise of share options 1,085,380    
Repurchase of shares (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) (200,000)
Payments of dividends   (9,010,045)  
Net cash (used in) provided by financing activities (24,560,965) 123,768,671 (200,000)
Effect of foreign currency exchange rate changes on cash and cash equivalents 281,067 536,835 38,326
Net increase in cash and cash equivalents 114,602,320 191,580,660 28,285,922
Cash and cash equivalents at the beginning of the year 236,883,282 45,302,622 17,016,700
Cash and cash equivalents at the end of the year 351,485,602 236,883,282 45,302,622
Supplemental cash flow information:      
Income taxes paid $ 1,758,448 849,773 $ 28,970
Noncash investing and financing activities:      
Accrual of issuance costs in accrued expenses and other current liabilities   $ 226,537