Cash and Investments

3 Months Ended

Mar. 31, 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 (in thousands):

	March 31, 2014		December 31, 2013
Cash	$	2,508	$	2,521
Cash equivalents:
Money market funds		12,435		8,989
Corporate commercial paper		1,250		—
Corporate debt securities		652		2,000
Total cash equivalents		14,337		10,989
Total cash and cash equivalents		16,845		13,510
Short-term investments:
Corporate commercial paper		1,250		1,500
Foreign government bonds		—		1,001
Corporate debt securities		4,881		4,794
Total short-term investments		6,131		7,295
Restricted cash—money market fund		250		250
Total cash, cash equivalents, short-term investments and restricted cash	$	23,226	$	21,055

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