Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Changes in Level 3 Securities (Details)

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Fair Value - Changes in Level 3 Securities (Details) - Level 3 [Member] - USD ($)
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value Beginning Balance $ 2,958,315 $ 9,287,209
Acquisitions 0 0
Disposals 0 0
Total Realized and Unrealized Gains (Losses) Included in Net Income (1,797,281) 1,410,623
Return of Capital Adjustments Impacting Cost Basis of Securities 0 (239,850)
Fair Value Ending Balance 1,161,034 10,457,982
Changes in Unrealized Gains (Losses), Included In Net Income, Relating to Securities Still Held (1,797,281) 1,410,623
Other Equity Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value Beginning Balance 2,958,315 9,287,209
Acquisitions 0 0
Disposals 0 0
Total Realized and Unrealized Gains (Losses) Included in Net Income (1,797,281) 1,410,623
Return of Capital Adjustments Impacting Cost Basis of Securities 0 (239,850)
Fair Value Ending Balance 1,161,034 10,457,982
Changes in Unrealized Gains (Losses), Included In Net Income, Relating to Securities Still Held $ (1,797,281) $ 1,410,623