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Short-term Investments (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2014

Dec. 31, 2013

Marketable Securities Measured at Fair Value


	June 30, 2014
	Amortized cost		Unrealized gains		Unrealized loss		Fair value
	(unaudited)
U.S. agency notes	$	22,535	$	1	$	(4)	$	22,532
Corporate bonds		43,148		2		(9)		43,141
Commercial paper		39,177		1		—		39,178
Total Marketable Securities	$	104,860	$	4	$	(13)	$	104,851


		December 31, 2013
	Amortized cost		Unrealized gains		Unrealized loss		Fair value
U.S. agency notes	$	23,298	$	1	$	(2)	$	23,297
Corporate bonds		42,766		7		(5)		42,768
Commercial paper		36,614		—		(1)		36,613
Total Marketable Securities	$	102,678	$	8	$	(8)	$	102,678

- 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