Transition report pursuant to Rule 13a-10 or 15d-10

Common Stock and Net Loss Per Share (Details)

v2.4.0.8
Common Stock and Net Loss Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 2 Months Ended 3 Months Ended 11 Months Ended 12 Months Ended
Dec. 31, 2013
Oct. 31, 2013
Jul. 31, 2013
Apr. 30, 2013
Jan. 31, 2013
Oct. 31, 2012
Jul. 31, 2012
Apr. 30, 2012
Dec. 31, 2013
item
Dec. 31, 2012
Jan. 31, 2013
Jan. 31, 2012
Common Stock and Net Loss Per Share                        
Number of votes per share holders of common stock are entitled                 1      
Numerator:                        
Net loss                 $ (27,017) $ (24,462) $ (38,148) $ (16,107)
Accretion of redeemable convertible preferred stock                       (110)
Increase in cumulative dividends payable upon conversion or liquidation of redeemable convertible preferred stock                       (3,648)
Net loss attributable to common stockholders $ 11,057 $ (1,700) $ (7,787) $ (28,587) $ (14,557) $ 2,052 $ (5,415) $ (20,228) $ (27,017) $ (24,462) $ (38,148) $ (19,865)
Denominator:                        
Weighted-average common shares outstanding used in computing basic and diluted net loss per share (in shares)                 180,968 167,956 168,294 105,955
Net loss per share, basic and diluted (in dollars per share) $ 0.06 $ (0.01) $ (0.04) $ (0.16) $ (0.09) $ 0.01 $ (0.03) $ (0.12) $ (0.15) $ (0.15) $ (0.23) $ (0.19)
Anti-dilutive securities                        
Potential common shares outstanding that were excluded from the computation of diluted net loss per share                 33,074   31,615 36,393
Options to purchase common stock
                        
Anti-dilutive securities                        
Potential common shares outstanding that were excluded from the computation of diluted net loss per share                 22,708   26,103 34,811
Warrants to purchase common stock
                        
Anti-dilutive securities                        
Potential common shares outstanding that were excluded from the computation of diluted net loss per share                       155
Restricted stock units
                        
Anti-dilutive securities                        
Potential common shares outstanding that were excluded from the computation of diluted net loss per share                 10,366   5,512 1,427