Fair Value Measurements (Tables)

6 Months Ended

Jun. 27, 2014

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value Based on Three-Tier Fair Value Hierarchy

The following table sets forth the fair value of the Company’s financial assets and liabilities measured at fair value based on the three-tier fair value hierarchy (in thousands):

	Level 1		Level 2		Level 3		Total
As of June 27, 2014
Cash equivalents
Money market funds	$	26,184	$	—	$	—	$	26,184
Short-term investments
State, municipal and local government agencies bonds	—		35,420		—		35,420
Corporate bonds	—		30,117		—		30,117
Commercial paper	—		5,694		—		5,694
U.S. federal government bonds	4,007		—		—		4,007
Prepaids and other current assets
Derivative assets (1)	—		79		—		79
Total assets measured and recorded at fair value	$	30,191	$	71,310	$	—	$	101,501
Accrued liabilities
Derivative liabilities (1)	$	—	$	16	$	—	$	16
Total liabilities measured and recorded at fair value	$	—	$	16	$	—	$	16
	Level 1		Level 2		Level 3		Total
As of December 31, 2013
Cash equivalents
Money market funds	$	51,014	$	—	$	—	$	51,014
Short-term investments
State, municipal and local government agencies bonds	—		40,449		—		40,449
Corporate bonds	—		33,496		—		33,496
Commercial paper	—		2,299		—		2,299
U.S. federal government bonds	4,008		—		—		4,008
Prepaids and other current assets
Derivative assets (1)	—		196		—		196
Total assets measured and recorded at fair value	$	55,022	$	76,440	$	—	$	131,462
Accrued liabilities
Derivative liabilities (1)	$	—	$	195	$	—	$	195
Total liabilities measured and recorded at fair value	$	—	$	195	$	—	$	195