| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 21, 2023 | Dec 20, 2023 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 15, 2023 | Dec 14, 2023 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 13, 2023 | Jun 12, 2023 | 001-13759 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 24, 2023 | Feb 23, 2023 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 3, 2020 | Nov 2, 2020 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 2, 2020 | Oct 1, 2020 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2020 | Sep 1, 2020 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 4, 2020 | Aug 3, 2020 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 30, 2020 | Jun 29, 2020 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 12, 2020 | Jun 11, 2020 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 18, 2020 | May 15, 2020 | 001-13759 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 16, 2019 | May 15, 2019 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 4, 2019 | Mar 1, 2019 | 001-13759 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 1, 2019 | Mar 1, 2019 | 001-13759 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 3, 2016 | May 2, 2016 | 001-13759 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 22, 2015 | Dec 21, 2015 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 18, 2015 | Dec 16, 2015 | 001-13759 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 21, 2015 | May 1, 2015 | 001-13759 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 5, 2015 | May 1, 2015 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 19, 2014 | Dec 17, 2014 | 001-13759 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 2, 2014 | May 1, 2014 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2014 | Feb 26, 2014 | 001-13759 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2014 | Feb 26, 2014 | 001-13759 |