| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Oct 2021 | 05 Oct 2021 | 000-55882 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Feb 2021 | 01 Feb 2021 | 000-55882 |
| 4 | Open Document | Open Filing | 26 Nov 2019 | 25 Nov 2019 | 000-55882 | |
| 3 | Open Document | Open Filing | 22 Feb 2019 | 14 Feb 2019 | 000-55882 |