Fair Value Measurements (Tables)

9 Months Ended

Sep. 26, 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 September 26, 2014
Cash equivalents
Money market funds	$	4,292	$	—	$	—	$	4,292
Short-term investments
State, municipal and local government agencies bonds	—		25,714		—		25,714
Corporate bonds	—		26,138		—		26,138
Commercial paper	—		3,299		—		3,299
U.S. federal government bonds			—		—		—
Prepaids and other current assets
Derivative assets (1)	—		19		—		19
Other assets
Long-term investment	3,101						3,101
Total assets measured and recorded at fair value	$	7,393	$	55,170	$	—	$	62,563
Accrued liabilities
Derivative liabilities (1)	$	—	$	331	$	—	$	331
Total liabilities measured and recorded at fair value	$	—	$	331	$	—	$	331
	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