Cash, Cash Equivalents and Investments

3 Months Ended

Mar. 31, 2016

Cash And Cash Equivalents [Abstract]

Cash, Cash Equivalents and Investments

2. Cash, Cash Equivalents and Investments

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

	March 31, 2016		December 31, 2015
Cash	$	8,325	$	7,270
Cash equivalents:
Money market funds		2,268		1,500
Corporate commercial paper		1,749		5,404
Corporate debt securities		—		2,269
Total cash equivalents		4,017		9,173
Total cash and cash equivalents		12,342		16,443
Short-term investments:
Corporate commercial paper		10,735		6,245
Treasury bonds		1,008		1,007
Corporate debt securities		3,541		6,028
Total short-term investments		15,284		13,280
Restricted cash equivalents—money market fund		250		250
Total cash, cash equivalents and short-term investments	$	27,876	$	29,973

Gross unrealized gains and losses on our short-term investments were not material as of March 31, 2016 and December 31, 2015. Restricted cash equivalents relates to a letter of credit securing the lease of our corporate headquarters.