| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 5/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 19, 2022 | Dec 31, 2021 | 000-14384 |
| 5/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2022 | Dec 31, 2021 | 000-14384 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2022 | Dec 31, 2017 | 000-14384 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 9, 2016 | Dec 9, 2016 | 000-14384 |