Marketable Securities

12 Months Ended

Dec. 31, 2018

Marketable Securities [Abstract]

Marketable Securities

5. 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

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

Available-for-sale Securities 

At December 31, 2018 and 2017, the Company had invested in the marketable securities of certain publicly traded companies. At December 31, 2018 and 2017, the Company recorded an unrealized loss of $42,283 and an unrealized gain of $133,067, respectively, representing the difference between the cost basis and the estimated fair value, as accumulated other comprehensive income in the stockholder's equity section of the Company’s consolidated balance sheet and as a change in unrealized gains and losses on marketable securities in the Company’s consolidated statements of comprehensive income (loss). The Company’s investment in marketable securities will be revalued on each balance sheet date.  The fair value of the Company’s holdings in marketable securities at December 31, 2018 and 2017 is a Level 1 measurement based on quoted prices in an active market.