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Fair Value of Financial Instruments - Schedule of Investment Income (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Fair Value Disclosures [Abstract]        
Interest and dividends accrued and paid $ 143,633 $ 69,559 $ 248,043 $ 138,848
Realized gains 969 3,902 10,350 8,337
Investment income, net $ 144,602 $ 73,461 $ 258,393 $ 147,185