Cash and Investments

3 Months Ended

Mar. 31, 2018

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):

	March 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	56,232	$	—	$	—		$	56,232
Cash equivalents:
Money market funds		9,680		—		—			9,680
Marketable securities:
U.S. Government agency securities		1,500		—		(4	)		1,496
Certificate of deposits		6,999		—		(4	)		6,995
Commercial paper		5,481		—		(7	)		5,474
Corporate debt securities		37,017		—		(175	)		36,842
Asset-backed securities		7,204		—		(36	)		7,168
Total cash, cash equivalents, and marketable securities	$	124,113	$	—	$	(226	)	$	123,887
	December 30, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	34,643	$	—	$	—		$	34,643
Cash equivalents:
Money market funds		256		—		—			256
Marketable securities:
U.S. Government agency securities		1,500		—		(5	)		1,495
Certificates of deposits		14,498		—		(1	)		14,497
Commercial paper		7,952		—		(3	)		7,949
Corporate debt securities		48,073		—		(105	)		47,968
Asset-backed securities		10,240		—		(19	)		10,221
Total cash, cash equivalents, and marketable securities	$	117,162	$	—	$	(133	)	$	117,029

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 March 31, 2018 and December 30, 2017, 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 March 31, 2018 and April 1, 2017, net realized gains and losses were not material.

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 months ended March 31, 2018 and April 1, 2017 were not material and no marketable securities had other than temporary impairment.

All marketable securities as of March 31, 2018 and December 30, 2017, had maturity dates of less than two years.