| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Apr 26, 2024 | Apr 24, 2024 | 000-21039 | |
| 4 | Open Document | Open Filing | Apr 28, 2023 | Apr 26, 2023 | 000-21039 | |
| 4 | Open Document | Open Filing | Apr 29, 2022 | Apr 27, 2022 | 000-21039 | |
| 4 | Open Document | Open Filing | FORM 4 | May 24, 2021 | May 20, 2021 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | Apr 29, 2021 | Apr 27, 2021 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | Dec 14, 2020 | Dec 10, 2020 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | May 18, 2020 | May 14, 2020 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | May 15, 2020 | May 13, 2020 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | Apr 29, 2020 | Apr 28, 2020 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | Jun 14, 2019 | Jun 12, 2019 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | May 20, 2019 | May 16, 2019 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | May 2, 2019 | Apr 30, 2019 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | Jun 15, 2018 | Jun 8, 2018 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | May 21, 2018 | May 17, 2018 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | May 3, 2018 | May 1, 2018 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | May 22, 2017 | May 18, 2017 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 4, 2017 | May 2, 2017 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | May 23, 2016 | May 19, 2016 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 5, 2016 | May 3, 2016 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | May 22, 2015 | May 20, 2015 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 7, 2015 | May 5, 2015 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | May 16, 2014 | May 14, 2014 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 8, 2014 | May 6, 2014 | 000-21039 |