Marketable Securities

Available-for-sale marketable securities and cash and cash equivalents as of March 31, 2019 and December 31, 2018 consist of the following (in thousands):



	March 31, 2019
	Amortized Cost Value		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents:
Cash	$	60,535	$	—	$	—		$	60,535
Money market funds	10,969		—		—			10,969
Total	$	71,504	$	—	$	—		$	71,504

Marketable securities:
Domestic corporate debt securities	$	87,940	$	—	$	(180	)	$	87,760
Agency bonds	45,020		—		(101		)	44,919
Total	$	132,960	$	—	$	(281	)	$	132,679



	December 31, 2018
	Amortized Cost Value		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents:
Cash	$	20,448	$	—	$	—		$	20,448
Money market funds	38,873		—		—			38,873
Total	$	59,321	$	—	$	—		$	59,321

Marketable securities:
Domestic corporate debt securities	$	132,886	$	—	$	(530	)	$	132,356
Agency bonds	45,009		—		(225		)	44,784
Total	$	177,895	$	—	$	(755	)	$	177,140

There were 17 marketable securities with an aggregate fair value of $132.7 million in an unrealized loss position for more than 12 months as of March 31, 2019. There were 24 marketable securities with an aggregate fair value of $177.1 million in an unrealized loss position for more than 12 months as of December 31, 2018. The Company considered the decrease 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 at maturity, the Company did not consider these investments to be other-than-temporarily impaired as of March 31, 2019.

As of March 31, 2019, the aggregate fair value of marketable securities maturing within one year and after one year through two years was $132.7 million and $0, respectively.