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Capitalized Software - Capitalized software balances (Details) - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Capitalized software      
Gross Amount   $ 18,638,249 $ 12,461,245
Accumulated Amortization   (10,583,882) (6,592,330)
Net Amount $ 16,679,024 $ 8,054,367 $ 5,868,915