| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 23 Feb 2022 | 19 Dec 2021 | 000-55896 | |
| 4 | Open Document | Open Filing | 09 Jul 2021 | 14 Apr 2020 | 000-55896 | |
| 3 | Open Document | Open Filing | 19 Jul 2019 | 18 Jun 2019 | 000-55896 |