Fair Value of Financial Instruments and Fair Value Measurements (Details 3) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Notes to Financial Statements
Equity investments, at original cost	$ 45,336	$ 45,336
Gross unrealized appreciation	218,685	170,192
Equity investments, at fair market value	$ 264,021	$ 215,528