| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Jun 14, 2023 | Jun 13, 2023 | 000-22427 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 6, 2022 | May 4, 2022 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 18, 2022 | Feb 17, 2022 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 6, 2021 | May 5, 2021 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 9, 2020 | Apr 8, 2020 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 2, 2019 | May 2, 2019 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 7, 2018 | May 3, 2018 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 2, 2017 | May 1, 2017 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 16, 2016 | May 13, 2016 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 18, 2015 | May 15, 2015 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 7, 2015 | May 5, 2015 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 2, 2014 | Nov 30, 2014 | 000-22427 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 8, 2014 | May 6, 2014 | 000-22427 |