| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 5 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 14, 2022 | Dec 31, 2021 | 001-08604 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 12, 2021 | Nov 9, 2021 | 001-08604 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 16, 2021 | Dec 18, 2020 | 001-08604 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 16, 2021 | Dec 18, 2020 | 001-08604 |