Cash, Cash Equivalents and Marketable Securities

12 Months Ended

Dec. 31, 2015

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents and Marketable Securities

Cash, Cash Equivalents and Marketable Securities

Cash and cash equivalents and marketable securities consisted of the following as of December 31, 2015 and 2014 (in thousands):

December 31, 2015
Description	Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Cash	$	9,624	$	—	$	—		$	9,624
Cash equivalents:
Money market mutual funds	246		—		—			246
Total cash and cash equivalents	9,870		—		—			9,870
Short-term marketable securities:
Commercial paper	7,485		—		—			7,485
Corporate notes and bonds	44,483		—		(60		)	44,423
Government obligation	12,010		—		(12		)	11,998
U.S. agency obligations	32,543		—		(39		)	32,504
Total short-term marketable securities	96,521		—		(111		)	96,410
Marketable securities, noncurrent:
Corporate notes and bonds	4,453		—		(17		)	4,436
Government obligations	1,997		—		(4		)	1,993
Total marketable securities, noncurrent	6,450		—		(21		)	6,429
Cash, cash equivalents, short-term marketable securities and marketable securities, noncurrent	$	112,841	$	—	$	(132	)	$	112,709
December 31, 2014
Description	Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Cash	$	18,985	$	—	$	—		$	18,985
Cash equivalents:
Money market mutual funds	1,609		—		—			1,609
Total cash and cash equivalents	20,594		—		—			20,594
Short-term marketable securities:
Commercial paper	2,499		—		—			2,499
Corporate notes and bonds	53,643		—		(35		)	53,608
U.S. agency obligations	36,907		—		(13		)	36,894
Total short-term marketable securities	93,049		—		(48		)	93,001
Marketable securities, noncurrent:
Corporate notes and bonds	3,501		—		(4		)	3,497
Government obligations	1,995		1		—			1,996
U.S. agency obligations	2,049		—		—			2,049
Total marketable securities, noncurrent	7,545		1		(4		)	7,542
Cash, cash equivalents, short-term marketable securities and marketable securities, noncurrent	$	121,188	$	1	$	(52	)	$	121,137

As of December 31, 2015 and 2014, we did not consider any of our investments to be other-than-temporarily impaired.

As of December 31, 2015, the following table summarizes the estimated fair value of our investments in marketable securities, all of which are considered available-for-sale, classified by the contractual maturity date (in thousands):

Due within 1 year	$	96,410
Due within 1 year through 3 years	6,429
Total marketable securities	$	102,839

See also Note 7.