Investments In Securities Held To Maturity (Tables)

6 Months Ended

Jun. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Summary of held to maturity securities

The following is a summary of held to maturity securities at June 30, 2017:

		June 30, 2017
	Contractual Maturity (in months)	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market   Value
Mutual funds		$	—	$	—	$	—		$	—
Corporate fixed income  securities	Less than 12 months		2,345		3					2,348
Commercial paper	Less than 12 months		600		3		(1	)		602
Total investments		$	2,945	$	6	$	(1	)	$	2,950