Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2018

Marketable Securities [Abstract]

Schedule of marketable securities

Marketable securities in equity securities with readily determinable market prices consisted of the following as of December 31, 2018 and December 31, 2017: 

	Available-for-sale securities at December 31, 2018
			Gross unrealized		Gross realized
	Cost		gains (losses)		gains (losses)		Fair value
Common shares	$220,880		($42,283)		$                —		$    178,597
		Available-for-sale securities at December 31, 2017
				Gross unrealized		Gross realized
		Cost		gains (losses)		gains (losses)	Fair value
Common shares		$1,701,503		$133,067		$                —	$ 1,834,570

Schedule of additional information about marketable securities

The following table presents additional information about marketable securities:

Balance at January 1, 2018	$     1,834,570
Purchases of marketable securities	858,458
Sales of marketable securities	(2,188,292)
Realized losses on marketable securities	(175,405)
Unrealized gains on marketable securities	(150,734)
Balance at December 31, 2018	$        178,597