| 25 Nov 2020 |
| Wells Fargo |
| Overweight |
| Equal Weight |
| downgrade |
| 24 Jun 2020 | Oppenheimer | Outperform | Perform | downgrade |
| 8 May 2020 | H.C. Wainwright | Neutral | Neutral | maintain |
| 11 Mar 2020 | H.C. Wainwright | Neutral | Neutral | maintain |
| 11 Mar 2020 | Wells Fargo | Overweight | Equal Weight | downgrade |
| 20 Dec 2018 | H.C. Wainwright | Neutral | Neutral | maintain |
| 11 Dec 2017 | Wells Fargo | Market Perform | Outperform | upgrade |