Cash, Cash Equivalents and Marketable Securities

6 Months Ended

Jun. 30, 2011

Cash, Cash Equivalents and Marketable Securities

Cash, Cash Equivalents and Marketable Securities

(3) Cash, Cash Equivalents and Marketable Securities

A summary of cash, cash equivalents and available-for-sale marketable securities held by the Company as of June 30, 2011 and December 31, 2010 is as follows:

	June 30, 2011
	Cost		Unrealized gains		Unrealized losses		Fair value
	(in thousands)
Cash and cash equivalents:
Cash and money market funds (Level 1)	$	18,889	$	—	$	—	$	18,889
Corporate debt securities due within 3 months of date of purchase (Level 2)	7,002		—		—		7,002
Total cash and cash equivalents	$	25,891	$	—	$	—	$	25,891
Marketable securities:
U.S. government sponsored entities due within 1 year of date of purchase (Level 2)	8,176		1		—		8,177
Corporate debt securities due within 1 year of date of purchase (Level 2)	28,812		9		—		28,821
Total marketable securities	36,988		10		—		36,998
Total cash, cash equivalents and marketable securities	$	62,879	$	10	$	—	$	62,889

	December 31, 2010
	Cost		Unrealized gains		Unrealized losses			Fair value
	(in thousands)
Cash and cash equivalents:
Cash and money market funds (Level 1)	$	25,228	$	—	$	—		$	25,228
U.S. government-sponsored entities and corporate debt securities due within 3 months of date of purchase (Level 2)	6,082		—		—			6,082
Total cash and cash equivalents	$	31,310	$	—	$	—		$	31,310
Marketable securities:
U.S. government and government sponsored entities due within 1 year of date of purchase (Level 2)	19,666		—		(3		)	19,663
Total cash, cash equivalents and marketable securities	$	50,976	$	—	$	(3	)	$	50,973