| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | May 28, 2025 | May 20, 2025 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 | May 24, 2024 | May 21, 2024 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 | May 18, 2023 | May 16, 2023 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | May 19, 2022 | May 17, 2022 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | May 20, 2021 | May 18, 2021 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 12, 2021 | Mar 10, 2021 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 10, 2020 | Dec 9, 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 8, 2020 | Oct 7, 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 11, 2020 | Aug 7, 2020 | 000-21835 |
| 4 | Open Document | Open Filing | FORM 4 - | May 14, 2020 | May 12, 2020 | 000-20797 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 9, 2020 | Mar 6, 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 16, 2019 | Dec 12, 2019 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 24, 2019 | Sep 20, 2019 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 18, 2019 | Jun 14, 2019 | 000-21835 |
| 4 | Open Document | Open Filing | FORM 4 - | May 16, 2019 | May 14, 2019 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | May 17, 2018 | May 15, 2018 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | May 23, 2017 | May 16, 2017 | 000-20797 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2016 | Dec 5, 2016 | 000-21835 |
| 4 | Open Document | Open Filing | FORM 4 - | May 19, 2016 | May 17, 2016 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | May 21, 2015 | May 19, 2015 | 000-20797 |
| 3 | Open Document | Open Filing | FORM 3 - | Jan 9, 2015 | Jan 1, 2015 | 000-20797 |