Net loss per share attributable to common stockholders (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
12 Months Ended |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Net loss per share |
|
|
|
|
|
|
|
|
|
|
|
| Net loss |
$ (24,360)
|
$ (22,527)
|
$ (24,258)
|
$ (18,637)
|
$ (15,305)
|
$ (12,615)
|
$ (10,539)
|
$ (9,033)
|
$ (89,782)
|
$ (47,492)
|
$ (24,838)
|
| Less: dividends on convertible preferred stock |
|
|
|
|
|
|
|
|
|
|
(151)
|
| Net loss attributable to common stockholders |
$ (24,360)
|
$ (22,527)
|
$ (24,258)
|
$ (18,637)
|
$ (15,305)
|
$ (12,615)
|
$ (10,539)
|
$ (9,033)
|
$ (89,782)
|
$ (47,492)
|
$ (24,989)
|
| Shares used in computing net loss per share attributable to common stockholders, basic and diluted |
|
|
|
|
|
|
|
|
28,213,324
|
846,027
|
691,731
|
| Net loss per share, basic and diluted |
$ (0.76)
|
$ (0.71)
|
$ (0.76)
|
$ (1.09)
|
$ (16.56)
|
$ (14.24)
|
$ (12.81)
|
$ (12.06)
|
$ (3.18)
|
$ (56.14)
|
$ (36.13)
|
| Antidilutive shares excluded from diluted net loss per share |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
|
|
|
|
|
|
|
|
4,193,153
|
25,469,124
|
14,749,326
|
| Options |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive shares excluded from diluted net loss per share |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
|
|
|
|
|
|
|
|
3,659,713
|
1,923,332
|
1,173,019
|
| Restricted stock units |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive shares excluded from diluted net loss per share |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
|
|
|
|
|
|
|
|
482,818
|
|
|
| ESPP |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive shares excluded from diluted net loss per share |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
|
|
|
|
|
|
|
|
45,963
|
|
|
| Convertible preferred stock |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive shares excluded from diluted net loss per share |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
|
|
|
|
|
|
|
|
|
23,521,889
|
13,521,900
|
| Unvested early exercise of outstanding options subject to repurchase |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive shares excluded from diluted net loss per share |
|
|
|
|
|
|
|
|
|
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |
|
|
|
|
|
|
|
|
4,659
|
23,903
|
54,407
|