Marketable Securities

6 Months Ended

Jun. 30, 2017

Marketable Securities

4. Marketable Securities

The following is a summary of the Company’s available-for-sale marketable securities as of June 30, 2017, which all have contract maturities of less than one year:

June 30, 2017 (in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
U.S. Treasury and government agencies	$	60,972	$	—	$	(57	)	$	60,915
Corporate debt		61,923		52		(4	)		61,971
	$	122,895	$	52	$	(61	)	$	122,886

The following is a summary of the Company’s available-for-sale marketable securities as of December 31, 2016, which all have contract maturities of less than one year:

December 31, 2016 (in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
U.S. Treasury and government agencies	$	50,661	$	3	$	(17	)	$	50,647
Corporate debt		50,194		89		(16	)		50,267
	$	100,855	$	92	$	(33	)	$	100,914