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Summary of Significant Accounting Policies - Fair Value of Financial Instruments (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Carrying amount of fixed rate long-term debt $ 93,401,776 $ 90,245,646
Fair value of fixed rate long-term debt $ 95,434,525 $ 92,279,147