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Prepayments and Other Current Assets - Schedule of Prepayments and Other Current Assets (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Prepayments And Other Current Assets    
Prepaid expenses $ 3,400,080 $ 3,370,757
Prepaid software license 378,488 89,822
Refundable income and franchise taxes 733,553 733,553
Security deposits 92,494 96,135
Other receivables 62,648 20,468
Prepayments and other current assets $ 4,667,263 $ 4,310,735