| 7 Feb 2019 |
| Leerink Swann |
| Market Perform |
| Outperform |
| upgrade |
| 3 Aug 2018 | Wedbush | Outperform | Outperform | maintain |
| 3 Jul 2018 | PiperJaffray | Overweight | Overweight | maintain |
| 6 Jan 2017 | JMP Securities | Market Perform | Outperform | upgrade |
| 20 Jul 2016 | FBR Capital | Outperform | Perform | downgrade |
| 20 Jul 2016 | Cowen & Co. | Outperform | Perform | downgrade |
| 10 Mar 2016 | Leerink Swann | Market Perform | Perform | maintain |