| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Feb 11, 2022 | Feb 9, 2022 | 000-51018 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 24, 2021 | May 21, 2021 | 000-51018 |
| 4 | Open Document | Open Filing | Feb 9, 2021 | Feb 9, 2021 | 000-51018 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2020 | May 20, 2020 | 000-51018 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 11, 2020 | Feb 10, 2020 | 000-51018 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2020 | Feb 4, 2020 | 000-51018 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 11, 2019 | Feb 11, 2019 | 000-51018 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2019 | Feb 4, 2019 | 000-51018 |