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

6 Months Ended

Jun. 30, 2013

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 June 30, 2013 and December 31, 2012 (in thousands):

As of June 30, 2013		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
Cash and money market funds		$	28,193		$	—		$	—		$	28,193
Corporate debt securities
Due in one year or less		20,251			1			(16		)	20,236
Due in two years or less		5,927			—			(11		)	5,916
Total		$	54,371		$	1		$	(27	)	$	54,345
Reported as:
Cash and cash equivalents		$	28,193		$	—		$	—		$	28,193
Short-term investments		26,178			1			(27		)	26,152
Total		$	54,371		$	1		$	(27	)	$	54,345

As of December 31, 2012		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
Cash and money market funds		$	14,776		$	—		$	—		$	14,776
Corporate debt securities
Due in one year or less		5,754			2			(1		)	5,755
Due in two years or less		10,867			3			(10		)	10,860
Total		$	31,397		$	5		$	(11	)	$	31,391
Reported as:
Cash and cash equivalents		$	14,776		$	—		$	—		$	14,776
Marketable securities		16,621			5			(11		)	16,615
Total		$	31,397		$	5		$	(11	)	$	31,391