| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 3, 2021 | Sep 1, 2021 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2021 | Jun 29, 2021 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 29, 2021 | Jun 25, 2021 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 18, 2021 | Feb 16, 2021 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 8, 2021 | Jan 7, 2021 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 31, 2020 | Dec 30, 2020 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 3, 2020 | Sep 1, 2020 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2020 | Feb 14, 2020 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 3, 2019 | Sep 1, 2019 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2019 | Feb 14, 2019 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 4, 2018 | Sep 1, 2018 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 7, 2018 | Mar 5, 2018 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 24, 2017 | Jul 20, 2017 | 001-10635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 19, 2016 | Jul 15, 2016 | 001-10635 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 10, 2015 | Aug 1, 2015 | 001-10635 |