| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 28 Mar 2022 | 24 Mar 2022 | 000-26495 | |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 30 Apr 2021 | 25 Mar 2021 | 000-26495 |
| 4 | Open Document | Open Filing | 23 Apr 2021 | 21 Mar 2021 | 000-26495 | |
| 4 | Open Document | Open Filing | 26 Jan 2021 | 25 Jan 2021 | 000-26495 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Feb 2020 | 26 Feb 2020 | 000-26495 |
| 4 | Open Document | Open Filing | 30 Jan 2020 | 28 Jan 2020 | 000-26495 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Feb 2019 | 18 Feb 2019 | 000-26495 |
| 4 | Open Document | Open Filing | 29 Jan 2019 | 25 Jan 2019 | 000-26495 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Jan 2019 | 01 Jan 2019 | 000-26495 |