Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2018

Marketable Securities Tables Abstract

Schedule of 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

Schedule of additional information about marketable securities

The following table presents additional information about marketable securities:

Balance at January 1, 2018	$          1,835
Purchases of marketable securities	856
Sales of marketable securities	(2,132)
Realized losses on marketable securities	(158)
Unrealized loss on marketable securities	(83)
Balance at June 30, 2018	$             318