Financial Instruments (Tables)

6 Months Ended

Jun. 28, 2014

Investments, All Other Investments [Abstract]

Cash and Marketable Securities' Cost, Unrealized Gains, Unrealized Losses and Fair Value by Significant Investment

The following table presents a summary of the Company’s financial instruments that are measured on a recurring basis as of December 28, 2013:

	December 28, 2013
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short-Term Marketable Securities		Long-Term Marketable Securities
Cash	$	7,023	$	—	$	—		$	7,023	$	7,023	$	—	$	—
Level 1:
Money market funds	9,226		—		—			9,226		9,226		—		—
Subtotal	9,226		—		—			9,226		9,226		—		—
Level 2:
U.S. Agency securities	22,929		4		(3		)	22,930		—		15,929		7,001
Certificates of deposit	8,840		4		(10		)	8,834		—		5,959		2,875
Commercial paper	998		—		(1		)	997		—		997		—
Corporate notes and bonds	14,156		9		(3		)	14,162		—		5,150		9,012
Subtotal	46,923		17		(17		)	46,923		—		28,035		18,888
Total	$	63,172	$	17	$	(17	)	$	63,172	$	16,249	$	28,035	$	18,888

The following tables show the Company’s cash and marketable securities’ cost, unrealized gains, unrealized losses and fair value by significant investment category measured at fair value on a recurring basis and recorded as cash and cash equivalents or short- and long-term marketable securities as of June 28, 2014:

	June 28, 2014
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short-Term Marketable Securities		Long-Term Marketable Securities
Cash	$	4,244	$	—	$	—		$	4,244	$	4,244	$	—	$	—
Level 1:
Money market funds	15,486		—		—			15,486		15,486		—		—
Subtotal	15,486		—		—			15,486		15,486		—		—
Level 2:
U.S. Agency securities	23,830		8		(4		)	23,834		—		11,185		12,649
Certificates of deposit	9,280		3		(4		)	9,279		—		6,399		2,880
Commercial paper	1,000		—		—			1,000		—		1,000		—
Corporate notes and bonds	14,756		16		(5		)	14,767		—		6,307		8,460
Subtotal	48,866		27		(13		)	48,880		—		24,891		23,989
Total	$	68,596	$	27	$	(13	)	$	68,610	$	19,730	$	24,891	$	23,989