Marketable Securities

9 Months Ended

Sep. 30, 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 September 30, 2018 and December 31, 2017:

	Available-for-sale securities at September 30, 2018
			Gross unrealized		Gross realized
	Cost		gains		gains (losses)		Fair value
Common shares	$	257	$	109	$	—	$	366

	Available-for-sale securities at December 31, 2017
			Gross unrealized		Gross realized
	Cost		gains		gains (losses)		Fair value
Common shares	$	1,702	$	133	$	—	$	1,835

The following table presents additional information about marketable securities:

Balance at January 1, 2018	$	1,835
Purchases of marketable securities		858
Sales of marketable securities		(2,159	)
Realized losses on marketable securities		(168	)
Balance at September 30, 2018	$	366

Available-for-sale Securities

At September 30, 2018 and December 31, 2017, the Company had invested in the marketable securities of certain publicly traded companies. At September 30, 2018 and December 31, 2017, the Company recorded an unrealized loss of nil and $132, 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 September 30, 2018 and December 31, 2017 is a Level 1 measurement based on quoted prices in an active market.