| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 23, 2025 | May 22, 2025 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 24, 2024 | Jun 21, 2024 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2024 | Mar 14, 2024 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2024 | Mar 14, 2024 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2023 | Dec 12, 2023 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 22, 2023 | May 22, 2023 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2023 | Mar 15, 2023 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 13, 2022 | Dec 9, 2022 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 30, 2022 | Aug 26, 2022 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2022 | May 11, 2022 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 8, 2022 | Mar 4, 2022 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2022 | Feb 24, 2022 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2021 | Aug 31, 2021 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2021 | Jun 1, 2021 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 30, 2020 | Nov 25, 2020 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 28, 2020 | Feb 25, 2020 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 1, 2019 | Oct 31, 2019 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 11, 2019 | Mar 7, 2019 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 1, 2019 | Feb 27, 2019 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 4, 2018 | Aug 30, 2018 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 13, 2017 | Nov 13, 2017 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 12, 2017 | May 11, 2017 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 2, 2016 | Dec 2, 2016 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 12, 2016 | May 11, 2016 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 22, 2015 | Dec 22, 2015 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 29, 2015 | May 27, 2015 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 17, 2014 | Nov 14, 2014 | 000-16540 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2014 | May 8, 2014 | 000-16540 |