Marketable Securities

9 Months Ended

Sep. 30, 2016

Marketable Securities

4. Marketable Securities

The following is a summary of the Company’s available-for-sale marketable securities as of September 30, 2016, which all have contract maturities of less than one year:

			Gross		Gross			Fair
September 30, 2016	Amortized		Unrealized		Unrealized			Market
(in thousands)	Cost		Gains		Losses			Value
U.S. Treasury and government agencies	$	54,662	$	33	$	—		$	54,695
Corporate debt		55,010		117		(8	)		55,119
	$	109,672	$	150	$	(8	)	$	109,814

The following is a summary of the Company’s available-for-sale marketable securities as of December 31, 2015, which all have contract maturities of less than one year:

			Gross		Gross			Fair
December 31, 2015	Amortized		Unrealized		Unrealized			Market
(in thousands)	Cost		Gains		Losses			Value
U.S. Treasury and government agencies	$	44,059	$	6	$	(8	)	$	44,057
Corporate debt		48,239		46		(5	)		48,280
	$	92,298	$	52	$	(13	)	$	92,337