Cash, Cash Equivalents and Short-Term Investments

6 Months Ended

Jun. 30, 2012

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents and Short-Term Investments

Cash, Cash Equivalents and Short-Term Investments

The following table presents cash, cash equivalents and available-for-sale investments for the periods presented (in thousands):

	As of June 30, 2012
	(unaudited)
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair value
Cash and cash equivalents:
Cash and money market funds	$	7,620	$	—	$	—		$	7,620
Money market funds	7,501		—		—			7,501
Commercial paper	4,998		—		(2		)	4,996
Total cash and cash equivalents	20,119		—		(2		)	20,117
Short-Term Investments:
Commercial paper	48,921		—		(183		)	48,738
Certificates of deposit	996		—		(1		)	995
U.S. government and agency securities	9,996		—		(5		)	9,991
Total short-term investments	59,913		—		(189		)	59,724
Total cash, cash equivalents and short-term investments	$	80,032	$	—	$	(191	)	$	79,841

At December 31, 2010 or 2011, the Company did not have any cash equivalents or short-term investments.