| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 5, 2022 | Apr 1, 2022 | 000-19961 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 3, 2022 | Feb 1, 2022 | 000-19961 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 13, 2021 | Sep 11, 2021 | 000-19961 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 5, 2021 | Apr 1, 2021 | 000-19961 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 14, 2020 | Sep 11, 2020 | 000-19961 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Sep 14, 2020 | Sep 11, 2020 | 000-19961 |