Marketable Debt Securities

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



	July 4, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Corporate bonds	$	27,700	$	3	$	(17	)	$	27,686
U.S. Agency bonds	22,517		24		—			22,541
U.S. Treasury securities	22,503		24		—			22,527
Municipal bonds	10,887		1		(5		)	10,883
Commercial paper	7,494		—		(1		)	7,493
	$	91,101	$	52	$	(23	)	$	91,130



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

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



	July 4, 2015				January 3, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Marketable debt securities – current (due in less than one year)	$	62,359	$	62,379	$	69,607	$	69,609
Marketable debt securities – non-current (due in one to two years)	28,742		28,751		44,498		44,441
	$	91,101	$	91,130	$	114,105	$	114,050

During the three months ended July 4, 2015 and June 28, 2014, $25.6 million and $13.5 million, respectively, of marketable debt securities matured and were redeemed at face value. During the six months ended July 4, 2015 and June 28, 2014, $41.8 million and $23.5 million, respectively, of marketable debt securities matured and were redeemed at face value.

Other Investments

We have a minority equity investment in one of our strategic product-development partners. The carrying value of this investment at July 4, 2015 and January 3, 2015 using the cost method is $6.0 million and is included in other assets on our condensed consolidated balance sheets.