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



	December 31, 2016
	Amortized Cost Value		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents:
Cash	$	77,443	$	—	$	—		$	77,443
Money market	173,631		—		—			173,631
Domestic corporate commercial paper	5,487		—		—			5,487
Domestic corporate debt securities	2,006		—		—			2,006
Total	$	258,567	$	—	$	—		$	258,567
Marketable securities:
Domestic corporate debt securities	$	19,317	$	—	$	(2	)	$	19,315
Domestic corporate commercial paper	31,852		78		—			31,930
Asset-backed securities	22,639		—		(4		)	22,635
Total	$	73,808	$	78	$	(6	)	$	73,880



	December 31, 2015
	Amortized Cost Value		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents:
Cash	$	2,934	$	—	$	—		$	2,934
Money market funds	83,257		—		—			83,257
Domestic corporate commercial paper	39,984		—		—			39,984
Government-sponsored enterprise debt securities	15,996		$	—	$	—		15,996
Domestic corporate debt securities	10,007		$	—	$	—		10,007
Asset-backed securities	7,500		$	—	$	—		7,500
Total	$	159,678	$	—	$	—		$	159,678
Marketable securities:
Domestic corporate debt securities	$	173,142	—		$	(107	)	$	173,035
Domestic corporate commercial paper	84,004		154		—			84,158
Asset-backed securities	56,510		$	1	$	(43	)	56,468
Total	$	313,656	$	155	$	(150	)	$	313,661