| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Sep 22, 2022 | Sep 21, 2022 | 000-55656 | |
| 4 | Open Document | Open Filing | Jul 30, 2021 | Jul 29, 2021 | 000-55656 | |
| SC 13D | Open Document | Open Filing | May 18, 2020 | |||
| 5 | Open Document | Open Filing | May 18, 2020 | Dec 31, 2019 | 000-55656 |