Cash and Investments

6 Months Ended

Jun. 30, 2013

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 June 30, 2013 and December 31, 2012 (in thousands):

	June 30, 2013		December 31, 2012
Cash	$	1,994	$	2,590
Cash equivalents:
Money market funds		8,777		7,313
Total cash equivalents		8,777		7,313
Total cash and cash equivalents		10,771		9,903
Short-term investments:
Municipal securities		—		356
Corporate commercial paper		1,250		4,374
Foreign government bonds		1,001		999
Corporate debt securities		7,080		4,097
Total short-term investments		9,331		9,826
Restricted cash—money market fund		875		875
Total cash, cash equivalents, investments and restricted cash	$	20,977	$	20,604

Gross unrealized gains and losses on our short-term investments were not material as of June 30, 2013 and December 31, 2012. Our restricted cash balance at June 30, 2013 and December 31, 2012 relates to a letter of credit which will continue to secure our corporate headquarter lease obligation to its expiration in 2014.