| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2023 | May 31, 2023 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 31, 2023 | Mar 31, 2023 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2022 | May 3, 2022 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 8, 2021 | Sep 8, 2021 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 20, 2021 | May 19, 2021 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2021 | Mar 12, 2021 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 4, 2020 | Sep 3, 2020 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 17, 2019 | Sep 16, 2019 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2019 | Jun 28, 2019 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 27, 2019 | Jun 26, 2019 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 21, 2018 | Sep 19, 2018 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 21, 2017 | Dec 19, 2017 | 000-12456 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 9, 2017 | May 4, 2017 | 000-12456 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 31, 2017 | Mar 24, 2017 | 000-12456 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Mar 31, 2017 | Aug 5, 2013 | 000-12456 |