Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2014

Marketable Securities

Schedule of available-for-sale marketable securities and cash and cash equivalents

Available-for-sale marketable securities and cash and cash equivalents consist of the following (in thousands):

	June 30, 2014
	Amortized Cost Value		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents:
Cash	$	1,133	$	—	$	—		$	1,133
Money market funds	31,417		—		—			31,417
Domestic corporate debt securities	5,382		—		(1		)	5,381
Domestic corporate commercial paper	10,439		1		—			10,440
Total	$	48,371	$	1	$	(1	)	$	48,371
Marketable securities:
Domestic corporate debt securities	22,157		—		(5		)	22,152
Domestic corporate commercial paper	8,492		6		—			8,498
Total	$	30,649	$	6	$	(5	)	$	30,650

	December 31, 2013
	Amortized Cost Value		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Cash and cash equivalents:
Cash	$	2,710	$	—	$	—	$	2,710
Money market fund	9,593		—		—		9,593
Total	$	12,303	$	—	$	—	$	12,303