| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2022 | 01 Apr 2022 | 000-12508 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Dec 2021 | 25 Oct 2021 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Dec 2021 | 25 Oct 2021 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2021 | 01 Apr 2021 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Mar 2021 | 19 Mar 2021 | 000-12508 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 May 2020 | 18 May 2020 | 000-12508 |