| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2022 | Apr 1, 2022 | 000-33385 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2021 | Dec 13, 2021 | 000-33385 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 24, 2020 | Nov 2, 2020 | 000-33385 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2020 | Mar 10, 2020 | 000-33385 |