| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Sep 9, 2021 | Sep 7, 2021 | 001-08519 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2021 | Jan 25, 2021 | 001-08519 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2020 | Jan 30, 2020 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2020 | Jan 30, 2020 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 29, 2020 | Jan 27, 2020 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2019 | Jan 28, 2019 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 29, 2018 | Jan 25, 2018 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 30, 2017 | Jan 26, 2017 | 001-08519 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | May 26, 2016 | Jan 28, 2016 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 1, 2016 | Jan 28, 2016 | 001-08519 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 30, 2015 | Jan 27, 2015 | 001-08519 |