XML 52 R24.htm IDEA: XBRL DOCUMENT

Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of Fair Value Hierarchy of Financial Assets Carried at Fair Value

As of December 31, 2014 and 2013, the fair value hierarchy for our financial assets and financial liabilities that are carried at fair value was as follows (in thousands):

	December 31, 2014								December 31, 2013
	Fair Value		Level I		Level II		Level III		Fair Value		Level I		Level II		Level III
Money market funds	$	1,275,346	$	1,275,346	$	—	$	—	$	460,313	$	460,313	$	—	$	—
U.S. treasury bills		16,673		16,673		—		—		—		—		—		—
Total	$	1,292,019	$	1,292,019	$	—	$	—	$	460,313	$	460,313	$	—	$	—

Available-for-Sale Marketable Securities

Our available-for-sale marketable securities classified by security type as of December 31, 2014 consisted of the following (in thousands):

Year Ended December 31, 2014

Amortized Cost

Gross Unrealized

Gains

Gross Unrealized

Losses

Fair Value

U.S. treasury bills

16,695

—

(22

)

16,673

Schedule of Changes in Fair Value of Common Stock Warrant Liability

The changes in the fair value of our common stock warrant liability were as follows (in thousands):

	Year Ended
	December 31, 2013
Fair value, beginning of period	$	10,692
Change in fair value		(10,692	)
Fair value, end of period	$	—

- 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

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References+ Details

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References+ Details