| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2024 | Jan 1, 2024 | 000-06920 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 15, 2023 | Dec 11, 2023 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2022 | Jun 1, 2022 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2022 | Jan 1, 2022 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 3, 2021 | Dec 2, 2021 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2021 | Sep 30, 2021 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2021 | Jun 1, 2021 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2021 | Jan 1, 2021 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 7, 2020 | Dec 3, 2020 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2020 | Jun 1, 2020 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2020 | Jan 1, 2020 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 9, 2019 | Dec 5, 2019 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 14, 2019 | May 11, 2019 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2019 | Jan 1, 2019 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 10, 2018 | Dec 6, 2018 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2018 | Jan 1, 2018 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 18, 2017 | Dec 14, 2017 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2017 | Oct 1, 2017 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2017 | Jan 1, 2017 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 5, 2016 | Dec 1, 2016 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2016 | Oct 1, 2016 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2016 | Jan 1, 2016 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 9, 2015 | Dec 7, 2015 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 5, 2015 | Oct 1, 2015 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 10, 2014 | Dec 8, 2014 | 000-06920 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2014 | Oct 1, 2014 | 000-06920 |