| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2021 | Aug 28, 2020 | 000-27569 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 3, 2020 | Dec 1, 2020 | 000-27569 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 22, 2020 | Feb 26, 2020 | 000-27569 |