| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 5 | Open Document | Open Filing | 15 Feb 2022 | 31 Dec 2021 | 000-26181 | |
| 4 | Open Document | Open Filing | 04 Feb 2019 | 15 Jan 2019 | 000-26181 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Jan 2018 | 30 Nov 2017 | 000-26181 |