Annual report pursuant to Section 13 and 15(d)

Fair Value - Changes in Level 3 Securities (Details)

v3.10.0.1
Fair Value - Changes in Level 3 Securities (Details) - Level 3 - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 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 1,161,034
Disposals (449,067) (8,752,201)
Total Realized and Unrealized Gains (Losses) Included in Net Income (1,845,309) 1,531,827
Return of Capital Adjustments Impacting Cost Basis of Securities (663,939) (269,554)
Fair Value Ending Balance 0 2,958,315
Changes in Unrealized Gains Included In Net Income, Relating to Securities Still Held 0 295,161
Other equity securities    
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 1,161,034
Disposals (449,067) (8,752,201)
Total Realized and Unrealized Gains (Losses) Included in Net Income (1,845,309) 1,531,827
Return of Capital Adjustments Impacting Cost Basis of Securities (663,939) (269,554)
Fair Value Ending Balance 0 2,958,315
Changes in Unrealized Gains Included In Net Income, Relating to Securities Still Held $ 0 $ 295,161