Cash and Investments

12 Months Ended

Dec. 31, 2013

Cash And Cash Equivalents [Abstract]

Cash and Investments

2. Cash and Investments

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

	December 31,
	2013		2012
Cash	$	2,521	$	2,590
Cash equivalents—money market funds		10,989		7,313
Total cash and cash equivalents		13,510		9,903
Short-term investments:
Municipal securities		—		356
Corporate commercial paper		1,500		4,374
Foreign government bonds		1,001		999
Corporate debt securities		4,794		4,097
Total short-term investments		7,295		9,826
Restricted cash—money market fund		250		875
Total cash, cash equivalents, short-term investments and restricted cash	$	21,055	$	20,604

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