| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 28 Dec 2021 | 23 Dec 2021 | 000-17995 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 08 Mar 2021 | 04 Mar 2021 | 000-17995 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 Nov 2020 | 11 Nov 2020 | 000-17995 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 13 Nov 2020 | 09 Nov 2020 | 000-17995 |