Cash, cash equivalents and short-term investments (Tables)

3 Months Ended

Mar. 31, 2014

Cash, cash equivalents and short-term investments

Summary of cash, cash equivalents and marketable securities

The following tables summarize our cash, cash equivalents and marketable securities at March 31, 2014 and December 31, 2013 (in thousands):

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and money market funds	$	56,134	$	—	$	—		$	56,134
Corporate debt securities
Due in one year or less	26,058		9		(8		)	26,059
Due in two years or less	7,273		—		(4		)	7,269
Total	$	89,465	$	9	$	(12	)	$	89,462
Reported as:
Cash and cash equivalents	$	56,134	$	—	$	—		$	56,134
Short-term investments	33,331		9		(12		)	33,328
Total	$	89,465	$	9	$	(12	)	$	89,462

December 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and money market funds	$	18,078	$	—	$	—		$	18,078
Corporate debt securities
Due in one year or less	22,631		11		(2		)	22,640
Due in two years or less	3,708		2		(1		)	3,709
Total	$	44,417	$	13	$	(3	)	$	44,427
Reported as:
Cash and cash equivalents	$	18,078	$	—	$	—		$	18,078
Short-term investments	26,339		13		(3		)	26,349
Total	$	44,417	$	13	$	(3	)	$	44,427