Cash And Investments

3 Months Ended

Mar. 31, 2012

Cash And Investments [Abstract]

Cash And Investments

2. Cash and Investments

Cash, cash equivalents, short-term investments, and restricted cash consist of the following (in thousands):

	March 31, 2012		December 31, 2011
Cash	$	2,032	$	1,428
Cash equivalents:
Corporate debt		501		501
Money market funds		4,700		6,576
Total cash equivalents		5,201		7,077
Total cash and cash equivalents		7,233		8,505
Short-term investments:
U.S. agency securities		1,752		1,751
Municipal securities		355		355
Corporate commercial paper		2,250		1,250
Foreign government bonds		501		500
Corporate debt securities		4,737		5,763
Total short-term investments		9,595		9,619
Restricted cash—money market fund		875		875
Total cash, cash equivalents, investments and restricted cash	$	17,703	$	18,999

Gross unrealized gains and losses on our short-term investments were not material as of March 31, 2012 and December 31, 2011. Our restricted cash balance at March 31, 2012 and December 31, 2011 relates to a letter of credit for our current corporate headquarters lease obligation, the majority of which will continue to secure that obligation through its expiration in 2014.