Cash and Investments (Tables)

3 Months Ended

Mar. 30, 2019

Investments Debt And Equity Securities [Abstract]

Cash, Cash Equivalents and Available-for-Sale Investments

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

	March 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	79,697	$	—	$	—		$	79,697
Cash equivalents:
Money market funds		10,526		—		—			10,526
Commercial paper		3,989		—		—			3,989
Certificates of deposit		1,000		—		—			1,000
Marketable securities:
Certificates of deposit		11,251		6		—			11,257
Commercial paper		16,896		9		—			16,905
Corporate debt securities		16,269		—		(13	)		16,256
Asset-backed securities		8,433		—		—			8,433
Total cash, cash equivalents, and marketable securities	$	148,061	$	15	$	(13	)	$	148,063
	December 29, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Market Value
Cash	$	108,845	$	—	$	—		$	108,845
Cash equivalents:
Money market funds		113		—		—			113
Commercial paper		1,993		—		—			1,993
Marketable securities:
Certificates of deposits		9,500		—		(3	)		9,497
Commercial paper		7,933		—		(1	)		7,932
Corporate debt securities		15,788		—		(58	)		15,730
Asset-backed securities		7,706		—		(24	)		7,682
Total cash, cash equivalents, and marketable securities	$	151,878	$	—	$	(86	)	$	151,792