Available-for-sale marketable securities and cash and cash equivalents as of June 30, 2017 and December 31, 2016 consist of the following (in thousands):



	June 30, 2017
	Amortized Cost Value		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents:
Cash	$	98,201	$	—	$	—		$	98,201
Money market funds	30,573		—		—			30,573
Domestic corporate debt securities	6,336		—		—			6,336
Total	$	135,110	$	—	$	—		$	135,110

Marketable securities:
Domestic corporate debt securities	$	34,918	$	—	$	(9	)	$	34,909
Domestic corporate commercial paper	44,685		12		—			44,697
Total	$	79,603	$	12	$	(9	)	$	79,606



	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 funds	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