Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2015

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 30, 2015
Cash equivalents:
Money market funds	$	12,747	$	—	$	—		$	12,747
Total		12,747		—		—			12,747
Available-for-sale securities:
Commercial paper securities	$	15,371	$	28	$	—		$	15,399
Corporate debt securities		29,215		2		—			29,217
U.S. government sponsored entity debt securities		140,402		24		—			140,426
Total		184,988		54		—			185,042
Total cash equivalents and available-for-sale securities	$	197,735	$	54	$	—		$	197,789
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

- 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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