Investments (Tables)

12 Months Ended

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Fair Value of Investments

	Note			Note
	receivable-			receivable-
Description	long-term			current			Investments
Balance at December 31, 2014	$	—		$	150		$	3,880
Total gains, realized or unrealized		—			—			636
Purchases, (sales), issuances and (settlements), net		375			(150	)		(3,836	)
Balance at December 31, 2015		375			—			680
Purchases, (sales), issuances and (settlements), net		(375	)		750			—
Balance at December 31, 2016		—			750			680
Reserve for notes receivable		—			(750	)		—
Net balance at December 31, 2016	$	—		$	—		$	680