6. Marketable Securities

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

There were no debt securities that had been in an unrealized loss position for more than 12 months as of June 30, 2014 or December 31, 2013. There were 13 debt securities in an unrealized loss position for less than 12 months at June 30, 2014 and there were no debt securities that had been in an unrealized loss position for less than 12 months at December 31, 2013. The aggregate unrealized loss on these securities as of June 30, 2014 was less than $5.0 thousand and the fair value was $27.5 million. The Company considered the decline in market value for these securities to be primarily attributable to current economic conditions. As it was not more likely than not that the Company would be required to sell these securities before the recovery of their amortized cost basis, which may be maturity, the Company did not consider these investments to be other-than-temporarily impaired as of June 30, 2014.

The contractual term to maturity of all marketable securities held by the Company as of June 30, 2014 is less than one year.