| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 7, 2025 | May 5, 2025 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2024 | May 9, 2024 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 8, 2024 | May 6, 2024 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 11, 2023 | May 9, 2023 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2023 | May 3, 2023 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 12, 2022 | Aug 11, 2022 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2022 | May 3, 2022 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2021 | May 6, 2021 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2021 | May 4, 2021 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2021 | Mar 16, 2021 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 11, 2020 | May 8, 2020 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 7, 2020 | May 6, 2020 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2019 | May 8, 2019 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 3, 2019 | May 2, 2019 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2018 | May 2, 2018 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 16, 2017 | Jun 15, 2017 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 8, 2017 | May 4, 2017 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2017 | May 3, 2017 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 6, 2016 | Jun 3, 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 26, 2016 | May 25, 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2016 | May 4, 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 21, 2015 | Dec 18, 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 16, 2015 | Dec 16, 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 23, 2015 | Sep 22, 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 8, 2014 | May 7, 2014 | 000-18516 |