| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Mar 11, 2022 | Mar 11, 2022 | 000-31161 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 15, 2021 | Jun 11, 2021 | 000-31161 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 18, 2021 | Feb 12, 2021 | 000-31161 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Feb 18, 2021 | Feb 12, 2021 | 000-31161 |