| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 25 Feb 2022 | 23 Feb 2022 | 000-06253 | |
| 4 | Open Document | Open Filing | 15 Jul 2021 | 13 Jul 2021 | 000-06253 | |
| 4 | Open Document | Open Filing | 23 Apr 2021 | 21 Apr 2021 | 000-06253 | |
| 3 | Open Document | Open Filing | 22 Jul 2020 | 13 Jul 2020 | 000-06253 |