Investments (Tables)

12 Months Ended

Jan. 02, 2016

Investments [Abstract]

Investments of marketable debt securities

Investments in marketable debt securities were comprised of the following (in thousands):

	January 2, 2016
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Corporate bonds	$	7,532	$	—	$	(19	)	$	7,513
Municipal bonds	5,114		—		(3		)	5,111
U.S. Agency bonds	2,497		—		(1		)	2,496
	$	15,143	$	—	$	(23	)	$	15,120

	January 3, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. Treasury securities	$	32,507	$	12	$	(23	)	$	32,496
Corporate bonds	35,409		2		(36		)	35,375
U.S. Agency bonds	22,545		4		(10		)	22,539
Municipal bonds	11,157		2		(5		)	11,154
Commercial paper	12,487		—		(1		)	12,486
	$	114,105	$	20	$	(75	)	$	114,050

Maturities of marketable debt securities

Maturities of marketable debt securities were as follows (in thousands):

	January 2, 2016				January 3, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Marketable debt securities – current (due in less than one year)	$	6,575	$	6,567	$	69,607	$	69,609
Marketable debt securities – non-current (due in one to two years)	8,568		8,553		44,498		44,441
	$	15,143	$	15,120	$	114,105	$	114,050