| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 12 Dec 2025 | 11 Dec 2025 | 001-14778 | |
| 4 | Open Document | Open Filing | 13 Dec 2024 | 12 Dec 2024 | 001-14778 | |
| 4 | Open Document | Open Filing | 08 Dec 2023 | 08 Dec 2023 | 001-14778 | |
| 4 | Open Document | Open Filing | 09 Dec 2022 | 08 Dec 2022 | 001-14778 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Dec 2021 | 09 Dec 2021 | 001-14778 |
| 4 | Open Document | Open Filing | 11 Dec 2020 | 10 Dec 2020 | 001-14778 | |
| 4 | Open Document | Open Filing | 13 Dec 2019 | 12 Dec 2019 | 001-14778 | |
| 4 | Open Document | Open Filing | 14 Dec 2018 | 13 Dec 2018 | 001-14778 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Dec 2017 | 07 Dec 2017 | 001-14778 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 Apr 2017 | 31 Mar 2017 | 001-14778 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 Jan 2016 | 31 Dec 2015 | 000-16929 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Dec 2014 | 05 Dec 2014 | 000-16929 |