Investments (Tables)

3 Months Ended

Mar. 31, 2014

Investments

Schedule of amortized cost and fair value of investments, with gross unrealized gains and losses

At March 31, 2014, the amortized cost and fair value of investments, with gross unrealized gains and losses, were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Money market funds	$	33,137	$	—	$	—		$	33,137
Commercial paper	10,238		9		—			10,247
Corporate debt securities	20,757		—		(10		)	20,747
Total investments	$	64,132	$	9	$	(10	)	$	64,131
Reported as:
Cash and cash equivalents								$	32,739
Marketable securities, current								29,302
Restricted cash								398
Marketable securities, non-current								1,692
Total investments								$	64,131

At December 31, 2013, the amortized cost and fair value of investments, with gross unrealized gains, were as follows:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	53,511	$	—	$	—	$	53,511
Federal agency securities	12,301		—		—		12,301
Commercial paper	8,246		3		—		8,249
Corporate debt securities	1,961		—		—		1,961
Total investments	$	76,019	$	3	$	—	$	76,022
Reported as:
Cash and cash equivalents							$	53,306
Marketable securities							22,511
Restricted cash							205
Total investments							$	76,022