Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2014

Investments Debt And Equity Securities [Abstract]

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


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
June 30, 2014
Cash equivalents:
Money market funds	$	92,223	$	—	$	—		$	92,223

Total		92,223		—		—			92,223

Available-for-sale securities:
Commercial paper securities	$	9,988	$	10	$	—		$	9,998
Corporate debt securities		9,908		—		(1	)		9,907
U.S. government sponsored entity debt securities		117,198		24		—			117,222

Total		137,094		34		(1	)		137,127

Total cash equivalents and available-for-sale securities	$	229,317	$	34	$	(1	)	$	229,350

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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