| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 18, 2024 | Jun 14, 2024 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 19, 2024 | Mar 15, 2024 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 13, 2024 | Mar 12, 2024 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 12, 2024 | Mar 9, 2024 | 000-15536 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2024 | Dec 31, 2023 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2023 | Mar 15, 2023 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 13, 2023 | Mar 9, 2023 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 13, 2023 | Feb 10, 2023 | 000-15536 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 9, 2023 | Dec 31, 2022 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 13, 2022 | Dec 10, 2022 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 26, 2022 | May 25, 2022 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 23, 2022 | May 18, 2022 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2022 | Mar 15, 2022 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 10, 2022 | Mar 9, 2022 | 000-15536 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 16, 2022 | Dec 10, 2021 | 000-15536 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2022 | Dec 31, 2021 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 13, 2021 | Dec 10, 2021 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 11, 2021 | Mar 9, 2021 | 000-15536 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 11, 2021 | Dec 31, 2020 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2020 | Dec 10, 2020 | 000-15536 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 13, 2020 | Dec 31, 2019 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 16, 2019 | Dec 12, 2019 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 12, 2019 | Dec 10, 2019 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 18, 2019 | Nov 15, 2019 | 000-15536 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 13, 2019 | Dec 31, 2018 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 13, 2018 | Dec 11, 2018 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 19, 2018 | Nov 15, 2018 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 16, 2018 | Nov 14, 2018 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 26, 2018 | Oct 24, 2018 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 18, 2017 | Dec 16, 2017 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2017 | Dec 12, 2017 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 20, 2017 | Nov 17, 2017 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 16, 2017 | Nov 15, 2017 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 21, 2017 | Jun 19, 2017 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 11, 2017 | May 9, 2017 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2016 | Dec 16, 2016 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 21, 2016 | Nov 17, 2016 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 17, 2016 | Nov 15, 2016 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 23, 2015 | Nov 19, 2015 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 19, 2015 | Nov 17, 2015 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 17, 2015 | Nov 13, 2015 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 18, 2014 | Dec 16, 2014 | 000-15536 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 16, 2014 | Dec 13, 2014 | 000-15536 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 9, 2014 | Oct 1, 2014 | 000-15536 |