Cash and Investments

9 Months Ended

Sep. 30, 2017

Investments Debt And Equity Securities [Abstract]

Cash and Investments

Note 4. Cash and Investments

The following tables present cash, cash equivalents, and available-for-sale investments as of the following dates (in thousands):

	September 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	38,235	$	—	$	—		$	38,235
Cash equivalents:
Money market funds		812		—		—			812
Commercial paper and corporate debt securities		4,994		—		—			4,994
Marketable securities:
U.S. Treasury securities		501		—		—			501
U.S. Government agency securities		2,001		—		(5	)		1,996
Certificate of deposits		23,298		—		—			23,298
Commercial paper		17,907		3		—			17,910
Corporate debt securities		45,701		—		(4	)		45,697
Asset-backed securities		6,916		—		(2	)		6,914
Total cash, cash equivalents, and marketable securities	$	140,365	$	3	$	(11	)	$	140,357
	December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	43,604	$	—	$	—		$	43,604
Cash equivalents:
Money market funds		959		—		—			959
Commercial paper and corporate debt securities		2,499		—		—			2,499
Marketable securities:
U.S. Treasury securities		5,667		—		—			5,667
U.S. Government agency securities		11,412		—		(7	)		11,405
Certificates of deposits		23,000		19		—			23,019
Commercial paper		22,402		—		—			22,402
Corporate debt securities		14,194		—		(6	)		14,188
Municipal securities		756		—		(1	)		755
Asset-backed securities		5,466		—		(3	)		5,463
Total cash, cash equivalents, and marketable securities	$	129,959	$	19	$	(17	)	$	129,961

Available-for-sale marketable securities, readily convertible to cash, with maturity dates of 90 days or less are classified as cash equivalents, while those with maturity dates greater than 90 days are classified as marketable securities within short-term assets. All marketable securities as of September 30, 2017 and December 31, 2016, were available-for-sale and reported at fair value based on the estimated or quoted market prices as of the balance sheet date.

Realized gains and losses on sale of securities are recorded in other income (expense), net, in the Company’s statement of operations. For the three months ended September 30, 2017 and September 24, 2016, net realized gains and losses were not material. For the nine months ended September 30, 2017 and September 24, 2016, net realized gains and losses were $0.9 million and $0.3 million, respectively.

Unrealized gains or losses, net of tax effect, are recorded in accumulated other comprehensive income (loss) within stockholders’ equity. Both the gross unrealized gains and gross unrealized losses for the three and nine months ended September 30, 2017 and September 24, 2016 were not material and no marketable securities had other than temporary impairment.

All marketable securities as of September 30, 2017 and December 31, 2016, had maturity dates of less than two years.