| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 23, 2021 | Dec 22, 2021 | 000-17995 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 7, 2019 | Jun 5, 2019 | 000-17995 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Feb 22, 2019 | Feb 20, 2019 | 000-17995 |