| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 23 May 2025 | 22 May 2025 | 000-27688 | |
| 4 | Open Document | Open Filing | 11 Apr 2025 | 09 Apr 2025 | 000-27688 | |
| 4 | Open Document | Open Filing | 09 Jul 2020 | 08 Jul 2020 | 000-27688 | |
| 4 | Open Document | Open Filing | 27 May 2020 | 29 Apr 2020 | 000-27688 | |
| 4 | Open Document | Open Filing | 26 Nov 2018 | 21 Nov 2018 | 000-27688 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Jul 2015 | 09 Jul 2015 | 000-27688 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Apr 2015 | 23 Apr 2015 | 000-27688 |