Investments (Tables)

12 Months Ended

Dec. 28, 2013

Amortized Cost and Fair Value of Available for Sale Investments

The amortized cost and fair values of available-for-sale investments are as follows at December 28, 2013 and December 29, 2012 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
December 28, 2013
Money market investments	$	2,499	$	—	$	—	$	2,499
Asset-backed securities		4,350		19		72		4,297
Corporate bonds and direct obligations of government agencies		76,786		783		370		77,199
U.S. Treasury obligations		18,524		31		13		18,542
Total	$	102,159	$	833	$	455	$	102,537
December 29, 2012
Money market investments	$	2,865	$	—	$	—	$	2,865
Asset-backed securities		2,175		73		—		2,248
Corporate bonds and direct obligations of government agencies		69,173		1,294		6		70,461
U.S. Treasury obligations		16,782		47		1		16,828
Total	$	90,995	$	1,414	$	7	$	92,402

Schedule of Unrealized Loss on Available for Sale Investments

For those available-for-sale investments with unrealized losses at December 28, 2013 and December 29, 2012, the following table summarizes the duration of the unrealized loss (in thousands):

	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
December 28, 2013
Asset-backed securities	$	3,429	$	72	$	—	$	—	$	3,429	$	72
Corporate bonds and direct obligations of government agencies		22,169		370		—		—		22,169		370
U.S. Treasury obligations		757		13		—		—		757		13
Total	$	26,355	$	455	$	—	$	—	$	26,355	$	455
December 29, 2012
Corporate bonds and direct obligations of government agencies	$	3,387	$	6	$	—	$	—	$	3,387	$	6
U.S. Treasury obligations		770		1		—		—		770		1
Total	$	4,157	$	7	$	—	$	—	$	4,157	$	7