| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 20-F | Open Document | Data | Open Filing | 20-F | Apr 30, 2025 | Dec 31, 2024 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | Apr 30, 2024 | Dec 31, 2023 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | May 1, 2023 | Dec 31, 2022 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | May 2, 2022 | Dec 31, 2021 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | Apr 30, 2021 | Dec 31, 2020 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | FORM 20-F | Apr 29, 2020 | Dec 31, 2019 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | Apr 30, 2019 | Dec 31, 2018 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | FORM 20-F | Apr 30, 2018 | Dec 31, 2017 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | May 1, 2017 | Dec 31, 2016 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | May 2, 2016 | Dec 31, 2015 | 000-33051 |
| 6-K | Open Document | Open Filing | FORM 6-K | May 2, 2016 | Apr 29, 2016 | 000-33051 |
| 6-K | Open Document | Open Filing | FORM 6-K | Aug 3, 2015 | Jul 31, 2015 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | FORM 20-F | Jun 30, 2015 | Dec 31, 2014 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | May 1, 2014 | Dec 31, 2013 | 000-33051 |
| NT 20-F | Open Document | Open Filing | NT 20-F | May 1, 2014 | Dec 31, 2013 | 000-33051 |
| 6-K | Open Document | Open Filing | FORM 6-K | Apr 30, 2014 | Apr 30, 2014 | 000-33051 |
| 6-K | Open Document | Open Filing | 6-K | Mar 24, 2014 | Mar 24, 2014 | 000-33051 |