| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4/A | Open Document | Open Filing | FORM 4/A | Jan 10, 2022 | Dec 31, 2021 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 4, 2022 | Dec 31, 2021 | 001-13471 |
| 4/A | Open Document | Open Filing | FORM 4/A | Sep 9, 2021 | Aug 10, 2021 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 3, 2021 | Aug 10, 2021 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | May 17, 2021 | May 13, 2021 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 28, 2020 | Dec 22, 2020 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 16, 2020 | Jun 13, 2020 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | May 15, 2020 | May 13, 2020 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 23, 2019 | Sep 19, 2019 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | May 14, 2019 | May 13, 2019 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 14, 2018 | Aug 10, 2018 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 14, 2018 | Jun 13, 2018 | 001-13471 |
| 4/A | Open Document | Open Filing | FORM 4/A | Jun 14, 2018 | Jun 8, 2018 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 8, 2018 | Jun 8, 2018 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | May 15, 2018 | May 11, 2018 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 21, 2017 | Sep 19, 2017 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 | May 16, 2017 | May 12, 2017 | 001-13471 |
| 4 | Open Document | Open Filing | FORM 4 - | May 17, 2016 | May 13, 2016 | 001-13471 |
| 3 | Open Document | Open Filing | FORM 3 - | May 10, 2016 | May 9, 2016 | 001-13471 |