| 7 Jun 2018 |
| RBC Capital |
| Outperform |
| Perform |
| downgrade |
| 9 Mar 2018 | RBC Capital | Outperform | Outperform | maintain |
| 18 Apr 2016 | Guggenheim | Neutral | Neutral | maintain |
| 7 Mar 2016 | Baird | Outperform | Outperform | maintain |
| 7 Mar 2016 | Leerink Swann | Outperform | Outperform | maintain |
| 7 Mar 2016 | RBC Capital | Outperform | Outperform | maintain |
| 7 Mar 2016 | H.C. Wainwright | Buy | Buy | maintain |