Cash and Investments (Tables)

3 Months Ended

Mar. 31, 2013

Cash and Investments [Abstract]

Cash, cash equivalents, investments and restricted cash

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

	March 31, 2013		December 31, 2012
Cash	$	4,239	$	2,590
Cash equivalents:
Money market funds		5,938		7,313
Total cash equivalents		5,938		7,313
Total cash and cash equivalents		10,177		9,903
Short-term investments:
Municipal securities		—		356
Corporate commercial paper		1,475		4,374
Foreign government bonds		1,000		999
Corporate debt securities		6,770		4,097
Total short-term investments		9,245		9,826
Restricted cash—money market fund		875		875
Total cash, cash equivalents, investments and restricted cash	$	20,297	$	20,604