| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 31 May 2022 | 27 May 2022 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | 16 Mar 2022 | 14 Mar 2022 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Dec 2021 | 01 Dec 2021 | 000-17196 |
| 3/A | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Oct 2021 | 01 Apr 2021 | 000-17196 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2021 | 01 Apr 2021 | 000-17196 |