Cash and Investments

9 Months Ended

Sep. 30, 2013

Cash And Cash Equivalents [Abstract]

Cash and Investments

2. Cash and Investments

Cash, cash equivalents, short-term investments, and restricted cash consisted of the following at September 30, 2013 and December 31, 2012 (in thousands):

	September 30, 2013		December 31, 2012
Cash	$	3,297	$	2,590
Cash equivalents—money market fund		9,939		7,313
Total cash and cash equivalents		13,236		9,903
Short-term investments:
Municipal securities		—		356
Corporate commercial paper		1,250		4,374
Foreign government bonds		1,001		999
Corporate debt securities		5,802		4,097
Total short-term investments		8,053		9,826
Restricted cash—money market fund		250		875
Total cash, cash equivalents, short-term investments and restricted cash	$	21,539	$	20,604

Gross unrealized gains and losses on our short-term investments were not material as of September 30, 2013 and December 31, 2012. Our restricted cash balance at September 30, 2013 and December 31, 2012 relates to a letter of credit which secures our corporate headquarters lease.