| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Sep 8, 2025 | Sep 5, 2025 | 000-20388 | |
| 4 | Open Document | Open Filing | Jun 9, 2025 | Jun 5, 2025 | 000-20388 | |
| 4 | Open Document | Open Filing | Apr 28, 2025 | Apr 24, 2025 | 000-20388 | |
| 4 | Open Document | Open Filing | Apr 29, 2024 | Apr 25, 2024 | 000-20388 | |
| 4 | Open Document | Open Filing | May 1, 2023 | Apr 27, 2023 | 000-20388 | |
| 4 | Open Document | Open Filing | FORM 4 | May 2, 2022 | Apr 28, 2022 | 000-20388 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2022 | Mar 31, 2022 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2022 | Dec 30, 2021 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 7, 2021 | Dec 3, 2021 | 001-33794 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 7, 2021 | Dec 2, 2020 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 3, 2021 | Dec 1, 2021 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2021 | Sep 30, 2021 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 21, 2021 | Sep 17, 2021 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 31, 2021 | Aug 27, 2021 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 2, 2021 | Jun 30, 2021 | 001-33794 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 26, 2021 | Apr 22, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 2, 2021 | Mar 31, 2021 | 001-33794 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 5, 2021 | Dec 31, 2020 | 001-33794 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 4, 2020 | Dec 2, 2020 | 001-33794 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 27, 2020 | Apr 23, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 16, 2020 | Mar 13, 2020 | 001-33794 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 6, 2019 | Dec 4, 2019 | 001-33794 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 30, 2019 | Apr 26, 2019 | 000-20388 |
| 3 | Open Document | Open Filing | FORM 3 | Dec 10, 2018 | Dec 10, 2018 | 000-20388 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 7, 2018 | Dec 5, 2018 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 8, 2017 | Dec 6, 2017 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 8, 2016 | Dec 7, 2016 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 5, 2016 | Oct 3, 2016 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2016 | Sep 30, 2016 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 5, 2016 | Jun 30, 2016 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2016 | Mar 31, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2016 | Dec 31, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 3, 2015 | Dec 2, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 2, 2015 | Sep 30, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 14, 2015 | Aug 13, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 10, 2015 | Aug 7, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2015 | Jun 30, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2015 | Mar 31, 2015 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2015 | Dec 31, 2014 | 001-33794 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 4, 2014 | Dec 2, 2014 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 4, 2014 | Dec 2, 2014 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 1, 2014 | Sep 30, 2014 | 001-33794 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 8, 2014 | Aug 7, 2014 | 001-33794 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 7, 2014 | Aug 7, 2014 | 001-33794 |