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Revenue - Contract Balances (Details)
9 Months Ended
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Revenue from Contract with Customer [Abstract]    
Accounts receivable, net $ 7,093,028 $ 5,207,205
Contract liabilities (unearned revenue) $ 10,660,068 $ 7,180,264
Length of contract with customers 1 year  
Contract length for sales commissions payment 1