Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards (Summary of Stock Option Activity) (Details)

v3.3.0.814
Stock-based Compensation Plans and Awards (Summary of Stock Option Activity) (Details) - 2014 Plan [Member]
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2015
USD ($)
$ / shares
shares
Stock Awards  
Balance as of December 31, 2014 | shares 10,791,081
Options granted | shares 3,332,800
Options exercised | shares (1,067,806)
Options forfeited | shares (128,888)
Options cancelled | shares (104,813)
Balance as of September 30, 2015 | shares 12,822,374
Vested and expected to vest at September 30, 2015 | shares 11,850,532
Exercisable as of September 30, 2015 | shares 6,103,793
Weighted-Average Exercise Price  
Balance as of December 31, 2014 $ 0.79
Options granted 1.40
Options exercised 0.52
Options forfeited 0.76
Options cancelled 0.50
Balance as of September 30, 2015 0.98
Vested and expected to vest at September 30, 2015 0.95
Exercisable as of September 30, 2015 $ 0.66
Weighted-Average Remaining Contractual Life (Years)  
Balance as of September 30, 2015 7 years 10 months 2 days
Vested and expected to vest at September 30, 2015 7 years 8 months 23 days
Exercisable as of September 30, 2015 6 years 6 months 4 days
Aggregate Intrinsic Value  
Balance as of September 30, 2015 | $ $ 4,154
Vested and expected to vest at September 30, 2015 | $ 4,098
Exercisable as of September 30, 2015 | $ $ 3,498