| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Dec 16, 2021 | Dec 14, 2021 | 000-55522 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 11, 2020 | Dec 9, 2020 | 000-55522 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 30, 2019 | Dec 27, 2019 | 000-55522 |