| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 25 May 2021 | 21 May 2021 | 000-24249 | |
| 4 | Open Document | Open Filing | 02 Dec 2020 | 01 Dec 2020 | 000-24249 | |
| 3 | Open Document | Open Filing | 02 Dec 2020 | 01 Dec 2020 | 000-24249 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Oct 2017 | 02 Oct 2017 | 000-53601 |