Financial Instruments Measured at Fair Value (Tables)

6 Months Ended

Jun. 28, 2014

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Short-Term Investments by Security Type

Investments that we have classified as short-term, by security type, are as follows (in thousands):

	June 28, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Municipal securities	$	200	$	—	$	—	$	200

	December 28, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Municipal securities	$	1,200	$	—	$	—	$	1,200

Effective Maturities of Short-Term Investments

Effective maturities of short-term investments at June 28, 2014 and December 28, 2013, were as follows (in thousands):

	June 28, 2014				December 28, 2013
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	200	$	200	$	1,200	$	1,200

Assets Measured at Fair Value on Recurring Basis

The following table summarizes, by major security type, our assets that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in thousands):

	Fair value measurements at June 28, 2014 using:
	Level 1		Level 2		Level 3		Total estimated fair value
Cash	$	52,455	$	—	$	—	$	52,455
Municipal securities		—		200		—		200
Money market funds		—		5,514		—		5,514
	$	52,455	$	5,714	$	—	$	58,169

	Fair value measurements at December 28, 2013 using:
	Level 1		Level 2		Level 3		Total estimated fair value
Cash	$	44,165	$	—	$	—	$	44,165
Municipal securities		—		1,200		—		1,200
Money market funds		—		7,503		—		7,503
	$	44,165	$	8,703	$	—	$	52,868