Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share (Details)

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Net Loss Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Numerator:        
Net loss $ (2,025) $ (4,092) $ (42,684) $ (49,680)
Denominator:        
Weighted-average common shares outstanding used in computing basic and diluted net loss per share 206,982 178,635 204,208 175,407
Net loss per share, basic and diluted $ (0.01) $ (0.02) $ (0.21) $ (0.28)
Anti-dilutive securities        
Anti-dilutive shares     22,910 34,199
Options to purchase common stock
       
Anti-dilutive securities        
Anti-dilutive shares     11,571 23,859
Restricted Stock Units (RSUs)
       
Anti-dilutive securities        
Anti-dilutive shares     11,339 10,340