Common Stock (Tables)

9 Months Ended

Sep. 30, 2012

Common Stock [Abstract]

Common stock outstanding and reserved shares of common stock for future issuance

	September 30, 2012
Stock option plan:
Options outstanding		37,279,442
RSUs		1,134,851
Stock awards available for future grants:
2005 Stock Option Plan (1)		—
2012 Equity Incentive Plan (1)		11,635,301
2012 Employee Stock Purchase Plan (1)		5,000,000
Total reserved shares of common stock for future issuance		55,049,594

(1) Refer to Note 5 for a description of these plans.