| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 20, 2022 | Jan 20, 2022 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 17, 2021 | Feb 14, 2021 | 000-50448 |
| 4/A | Open Document | Open Filing | FORM 4/A SUBMISSION | Sep 17, 2020 | Aug 31, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 1, 2020 | Aug 31, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 19, 2020 | Feb 14, 2020 | 000-50448 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Jan 8, 2020 | Jan 1, 2020 | 000-50448 |