Fair Value Measurements (Tables)

12 Months Ended

Dec. 29, 2012

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following tables set forth by level within the fair value hierarchy, our financial assets that were accounted for at fair value on a recurring basis at December 29, 2012, and December 31, 2011, according to the valuation techniques we used to determine their fair value (in thousands):



	December 29, 2012
	Level 1		Level 2		Level 3		Total
Marketable debt securities – current
U.S. Treasury securities	$	17,538	$	—	$	—	$	17,538
Corporate bonds	—		21,549		—		21,549
U.S. Agency bonds	—		7,586		—		7,586
Municipal bonds	—		4,591		—		4,591
	17,538		33,726		—		51,264
Marketable debt securities – non-current
U.S. Treasury securities	15,004		—		—		15,004
Corporate bonds	—		10,359		—		10,359
U.S. Agency bonds	—		10,056		—		10,056
Municipal bonds	—		3,223		—		3,223
	15,004		23,638		—		38,642
	$	32,542	$	57,364	$	—	$	89,906



	December 31, 2011
	Level 1		Level 2		Level 3		Total
Marketable debt securities – current
U.S. Treasury securities	$	20,020	$	—	$	—	$	20,020

Marketable debt securities – non-current
U.S. Treasury securities	10,042		—		—		10,042
	$	30,062	$	—	$	—	$	30,062