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Investments (Schedule of Unrealized Loss on Investments) (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Investments [Abstract]    
Aggregate Unrealized Losses, Loss duration less than one year $ 1,176,276 $ 561,300
Aggregate Unrealized Losses, Loss duration greater than one year 411,082 0
Aggregate Unrealized Losses, Total 1,587,358 561,300
Aggregate Fair Value of Investments, Loss duration less than one year 56,463,167 12,317,187
Aggregate Fair Value of Investments, Loss duration greater than one year 1,958,502 0
Aggregate Fair Value of Investments, Total $ 58,421,669 $ 12,317,187