| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 31 Jan 2022 | 27 Jan 2022 | 000-55924 | |
| 4 | Open Document | Open Filing | 22 Jul 2021 | 20 Jul 2021 | 000-55924 | |
| 3 | Open Document | Open Filing | 23 Apr 2021 | 14 Apr 2021 | 000-55924 |