Cash and Investments

9 Months Ended

Sep. 30, 2012

Cash and Investments [Abstract]

Cash and Investments

2. Cash and Investments

Cash, cash equivalents, short-term investments, and restricted cash consisted of the following at September 30, 2012 and December 31, 2011(in thousands):

	September 30, 2012		December 31, 2011
Cash	$	2,022	$	1,428
Cash equivalents:
Corporate debt		450		501
Money market funds		4,425		6,576
Total cash equivalents		4,875		7,077
Total cash and cash equivalents		6,897		8,505
Short-term investments:
U.S. agency securities				1,751
Municipal securities		355		355
Corporate commercial paper		5,373		1,250
Foreign government bonds				500
Corporate debt		6,054		5,763
Total short-term investments		11,782		9,619
Restricted cash—money market fund		875		875
Total cash, cash equivalents, investments and restricted cash	$	19,554	$	18,999

Gross unrealized gains and losses on our short-term investments were not material as of September 30, 2012 and December 31, 2011. Our restricted cash balance at September 30, 2012 and December 31, 2011 relates to a letter of credit which will continue to secure our corporate headquarter lease obligation to its expiration in 2014.