Annual report pursuant to Section 13 and 15(d)

Income Taxes - Aggregate Cost of Securities for Income Tax Purposes (Details)

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Income Taxes - Aggregate Cost of Securities for Income Tax Purposes (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Aggregate cost of securities for federal income tax purposes and securities with unrealized appreciation and depreciation    
Aggregate cost for federal income tax purposes $ 3,063,430 $ 4,327,077
Gross unrealized appreciation 325,130 5,408,242
Gross unrealized depreciation 0 0
Net unrealized appreciation $ 325,130 $ 5,408,242