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Summary of Significant Accounting Policies - Net Debt Issuance Costs and Bank Fees (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Debt issuance costs and bank fees paid to financial institutions $ 6,547,299 $ 9,302,292
Less: accumulated amortization (2,650,091) (5,164,419)
Unamortized debt issuance costs and bank fees 3,897,208 4,137,873
Amortization included in interest expense $ 662,440 $ 727,020