| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 20 Apr 2022 | 30 Dec 2020 | 000-51229 | |
| 4 | Open Document | Open Filing | 20 Apr 2022 | 30 Dec 2019 | 000-51229 | |
| 3 | Open Document | Open Filing | 20 Apr 2022 | 17 Dec 2018 | 000-51229 |