| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 2, 2024 | Jul 2, 2024 | 000-11668 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 22, 2024 | Jan 12, 2024 | 000-11668 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 22, 2023 | Jan 27, 2023 | 000-11668 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 18, 2022 | Feb 24, 2022 | 000-11668 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 9, 2021 | Mar 24, 2021 | 000-11668 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 10, 2019 | Sep 5, 2019 | 000-11668 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 3, 2019 | Aug 28, 2019 | 000-11668 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 25, 2019 | Jun 20, 2019 | 000-11668 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 18, 2019 | Jun 14, 2019 | 000-11668 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 10, 2019 | Feb 27, 2019 | 000-11668 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 6, 2018 | Jul 3, 2018 | 000-11668 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 20, 2017 | Jan 18, 2017 | 000-11668 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 25, 2016 | Jan 13, 2015 | 000-11668 |
| 4 | Open Document | Open Filing | Jan 23, 2014 | Jan 21, 2014 | 000-11668 |