| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 10, 2021 | Sep 9, 2021 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 15, 2021 | Jun 11, 2021 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 2, 2021 | Mar 31, 2021 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 3, 2021 | Mar 1, 2021 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 17, 2020 | Dec 15, 2020 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 28, 2020 | Oct 26, 2020 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 22, 2020 | Sep 19, 2020 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 4, 2020 | Mar 2, 2020 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 20, 2020 | Feb 20, 2020 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 3, 2019 | Jul 1, 2019 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 5, 2019 | Mar 1, 2019 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 28, 2019 | Feb 26, 2019 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 5, 2018 | Jul 2, 2018 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 5, 2018 | Mar 1, 2018 | 001-35784 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 5, 2017 | Jun 30, 2017 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 3, 2017 | Mar 1, 2017 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 19, 2016 | Sep 16, 2016 | 001-35784 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 19, 2016 | Sep 16, 2016 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 18, 2016 | Feb 16, 2016 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 7, 2015 | Dec 7, 2015 | 001-35784 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 24, 2015 | Aug 20, 2015 | 001-35784 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 13, 2015 | Feb 4, 2015 | 001-35784 |