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Investment in Debt Securities Available for Sale - Summary of Net Realized Losses On Sales of Available for Sale Securities and Investment Income Interest and Dividends (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Fair Value Disclosures [Abstract]        
Interest and dividends accrued and paid $ 2,857 $ 116,371 $ 66,029 $ 364,414
Realized gains 7,257 58,068 53,354 68,418
Investment income, net $ 10,114 $ 174,439 $ 119,383 $ 432,832