Short-term Investments

3 Months Ended

Mar. 31, 2013

Short-term Investments

(2) Short-term Investments

Marketable securities, classified as available-for-sale, are stated at fair value. There were no other-than-temporary losses during any of the periods presented.

As of March 31, 2013, the Company’s short-term investments were $51.5 million, consisting of certificates of deposit of $1.0 million and marketable securities measured at fair value as follows (in thousands):

	March 31, 2013
	Amortized		Unrealized		Unrealized			Fair
	cost		gains		loss			value
	(unaudited)
U.S. Agency Notes	$	13,245	$	1	$	—		$	13,246
Corporate bonds		27,760		2		(13	)		27,749
Commercial paper		9,542		—		—			9,542
Total Marketable Securities	$	50,547	$	3	$	(13	)	$	50,537

As of December 31, 2012, the Company’s short-term investments were $25.1 million, consisting of certificates of deposit of $1.0 million and marketable securities measured at fair value as follows (in thousands):

	December 31, 2012
	Amortized		Unrealized		Unrealized			Fair
	cost		gains		loss			value
U.S. Agency Notes	$	3,856	$	1	$	—		$	3,857
Corporate bonds		11,128		1		(3	)		11,126
Commercial paper		9,142		—		—			9,142
Total Marketable Securities	$	24,126	$	2	$	(3	)	$	24,125

As of March 31, 2013 and December 31, 2012, there were no short-term investments with maturity dates greater than one year.