Annual report pursuant to Section 13 and 15(d)

Income Taxes - Income Tax Benefit (Details)

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Income Taxes - Income Tax Benefit (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Total income tax expense (benefit) differs from the amount computed by applying the federal statutory income tax rates net investment income and net realized and unrealized gains on investments                      
Application of statutory income tax rate                 $ 904,111 $ 8,671,562 $ 12,231,838
State income taxes, net of federal tax benefit                 409,839 (583,186) 352,708
Income of Real Estate Investment Trust not subject to tax                 (941,900) (10,339,520) (11,975,853)
Tax reform impact                 0 0 1,262,444
Other                 (137,432) (167,582) 474,181
Income tax expense (benefit), net $ (182,710) $ (92,706) $ 62,699 $ 447,335 $ (612,384) $ (746,667) $ (614,849) $ (444,826) $ 234,618 $ (2,418,726) $ 2,345,318