(3) Cash, Cash Equivalents and Marketable Securities

A summary of cash, cash equivalents and available-for-sale marketable securities held by the Company as of December 31, 2014 and December 31, 2013 was as follows in thousands (see Note 2):

	December 31, 2014
	Cost		Unrealized gains		Unrealized losses			Fair value
Cash and cash equivalents:
Cash and money market funds (Level 1)	$	45,004	$	—	$	—		$	45,004
Corporate debt securities due within 3 months of date of purchase (Level 2)		1,020		—		—			1,020

Total cash and cash equivalents	$	46,024	$	—	$	—		$	46,024
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)		51,662		12		(8	)		51,666

Total cash, cash equivalents and marketable securities	$	97,686	$	12	$	(8	)	$	97,690

	December 31, 2013
	Cost		Unrealized gains		Unrealized losses			Fair value
Cash and cash equivalents:
Cash and money market funds (Level 1)	$	40,586	$	—	$	—		$	40,586
Corporate debt securities due within 3 months of date of purchase (Level 2)		7,904		—		—			7,904

Total cash and cash equivalents	$	48,490	$	—	$	—		$	48,490
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)		42,969		18		(1	)		42,986

Total cash, cash equivalents and marketable securities	$	91,459	$	18	$	(1	)	$	91,476