| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 9, 2021 | Aug 5, 2021 | 001-33500 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 10, 2020 | Aug 6, 2020 | 001-33500 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 12, 2019 | Aug 8, 2019 | 001-33500 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 13, 2018 | Aug 9, 2018 | 001-33500 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 14, 2017 | Aug 10, 2017 | 001-33500 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 15, 2016 | Aug 11, 2016 | 001-33500 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 11, 2015 | Aug 7, 2015 | 001-33500 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 11, 2014 | Aug 7, 2014 | 001-33500 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 7, 2014 | Aug 1, 2014 | 001-33500 |