Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Summary of Other Investment Income (Loss), Net

The following is a summary of Other Investment Income (Loss), net, for the three and six months ended June 30, 2018 and 2017:

	Three Months Ended				Six Months Ended
	6/30/18		6/30/17		6/30/18			6/30/17
Gain on Sales of Marketable Securities, net	$	-0-	$	1,019,877	$	20,107		$	1,051,768
Changes in Fair Value of Marketable Securities		16,623,670		-0-		(9,275,149	)		-0-
Total Other Investment Income (Loss), net	$	16,623,670	$	1,019,877	$	(9,255,042	)	$	1,051,768