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Investments - Investment Income (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Realized gains (losses) | $ 512,265 | $ 194,373 | $ (1,231,163) | $ 5,280,172
Unrealized gains (losses) | 4,040,917 | 1,089,398 | (6,478,411) | 11,489,980
Dividends | 518,472 | 1,559,836 | 1,983,423 | 5,808,218
Interest | 0 | 0 | 0 | 987,418
Other investment income (loss) | (18,860) | (20,660) | (56,523) | 61,631
Investment income (loss), net | $ 5,052,794 | $ 2,822,947 | $ (5,782,674) | $ 23,627,419

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