| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Feb 2022 | 15 Feb 2022 | 000-13232 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2021 | 16 Feb 2021 | 000-13232 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Feb 2020 | 19 Feb 2020 | 000-13232 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Aug 2015 | 11 Aug 2015 | 000-13232 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Aug 2015 | 11 Aug 2015 | 000-13232 |