Cash and Investments

6 Months Ended

Jun. 30, 2014

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 June 30, 2014 and December 31, 2013 (in thousands):

	June 30, 2014		December 31, 2013
Cash	$	2,544	$	2,521
Cash equivalents:
Money market funds		7,306		8,989
Corporate debt securities		1,252		2,000
Total cash equivalents		8,558		10,989
Total cash and cash equivalents		11,102		13,510
Short-term investments:
Corporate commercial paper		1,198		1,500
Foreign government bonds		—		1,001
Corporate debt securities		11,831		4,794
Total short-term investments		13,029		7,295
Restricted cash—money market fund		250		250
Total cash, cash equivalents, investments and restricted cash	$	24,381	$	21,055

Gross unrealized gains and losses on our short-term investments were not material as of June 30, 2014 and December 31, 2013. Our restricted cash balance at June 30, 2014 and December 31, 2013 relates to a letter of credit which secures our corporate headquarters lease.