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Equity Investments (Details 1) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Net change in unrealized appreciation on investments $ 506,190 $ (346,575) $ (102,711) $ 530,586
Level 3 [Member]        
Balance at beginning of year     464,466 474,390
Interest receivable converted to common stock, at cost     16,000
Net change in unrealized appreciation on investments     (414,730) 115,810
Net transfers out of Level 3 [1]     (49,736) (100,000)
Balance at end of period $ 506,200 506,200
Net unrealized depreciation for Level 3 investments at period end     $ (329,598)
[1] Transfers occurred due to the expiration of the restriction under Rule 144A of the Securities Act and to the development of an active market. A review of fair value hierarchy classifications is conducted on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification for certain financial assets or liabilities. Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in/out of the Level 3 category as of the beginning of the period in which the reclassifications occur.