| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 9, 2021 | Jul 7, 2021 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2020 | Sep 1, 2020 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 4, 2019 | Sep 1, 2019 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 5, 2018 | Sep 1, 2018 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 5, 2017 | Sep 1, 2017 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 24, 2017 | Aug 23, 2017 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 6, 2016 | Sep 1, 2016 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 3, 2015 | Sep 1, 2015 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2015 | Jul 3, 2015 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2014 | Sep 1, 2014 | 001-11038 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 27, 2014 | Aug 25, 2014 | 001-11038 |