Annual report pursuant to Section 13 and 15(d)

Fair Value - Changes in Level 3 Securities (Details)

v3.8.0.1
Fair Value - Changes in Level 3 Securities (Details) - Level 3 [Member] - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value Beginning Balance $ 9,287,209 $ 8,393,683
Acquisitions 1,161,034 0
Disposals (8,752,201) 0
Total Realized and Unrealized Gains Included in Net Income 1,531,827 781,154
Return of Capital Adjustments Impacting Cost Basis of Securities (269,554) 112,372
Fair Value Ending Balance 2,958,315 9,287,209
Changes in Unrealized Gains Included In Net Income, Relating to Securities Still Held 295,161 781,154
Other Equity Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value Beginning Balance 9,287,209 8,393,683
Acquisitions 1,161,034 0
Disposals 8,752,201 0
Total Realized and Unrealized Gains Included in Net Income 1,531,827 781,154
Return of Capital Adjustments Impacting Cost Basis of Securities (269,554) 112,372
Fair Value Ending Balance 2,958,315 9,287,209
Changes in Unrealized Gains Included In Net Income, Relating to Securities Still Held $ 295,161 $ 781,154