Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2014

Investments Debt And Equity Securities [Abstract]

Summary of Cash Equivalents and Available-for-Sale Securities

The table below summarizes the Company’s cash equivalents and available-for-sale securities (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
	Cost		Gains		(Losses)			Fair Value
December 31, 2014
Cash equivalents:
Money market funds	$	3,182	$	—	$	—		$	3,182
Total		3,182		—		—			3,182
Available-for-sale securities:
Commercial paper securities	$	33,715	$	33	$	—		$	33,748
Corporate debt securities		22,831		—		(18	)		22,813
U.S. government sponsored entity debt securities		163,671		—		(40	)		163,631
Total		220,217		33		(58	)		220,192
Total cash equivalents and available-for-sale securities	$	223,399	$	33	$	(58	)	$	223,374
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.

+ References+ Details