| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Mar 7, 2022 | Feb 1, 2022 | 000-51791 | |
| 4 | Open Document | Open Filing | Feb 23, 2022 | Feb 1, 2022 | 000-51791 | |
| 4 | Open Document | Open Filing | Feb 9, 2021 | Feb 5, 2021 | 000-51791 | |
| 4 | Open Document | Open Filing | STATEMENT OF BENEFICIAL OWNERSHIP | Feb 10, 2016 | Dec 23, 2015 | 000-51791 |