Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2014

Investments Debt And Equity Securities [Abstract]

The table below summarizes the Company’s investments (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost		Gains		(Losses)			Fair Value
September 31, 2014
Cash equivalents:
Money market funds	$	7,193	$	—	$	—		$	7,193
Total		7,193		—		—			7,193
Available-for-sale securities:
Commercial paper securities	$	36,195	$	53	$	—		$	36,248
Corporate debt securities		20,621		—		(11	)		20,610
U.S. government sponsored entity debt securities		163,399		11		—			163,410
Total		220,215		64		(11	)		220,268
Total cash equivalents and available-for-sale securities	$	227,408	$	64	$	(11	)	$	227,461
December 31, 2013
Cash equivalents:
Money market funds	$	6,934	$	—	$	—		$	6,934
Total		6,934		—		—			6,934
Available-for-sale securities:
U.S. government sponsored entity debt securities		121,278		12		—			121,290
Total cash equivalents and available-for-sale securities	$	128,212	$	12	$	—		$	128,224

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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