| 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 | May 31, 2019 | May 30, 2019 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2019 | Jan 28, 2019 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 30, 2018 | May 29, 2018 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2018 | Feb 23, 2018 | 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 | Nov 14, 2016 | Nov 7, 2016 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2016 | Nov 7, 2016 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 10, 2016 | Aug 8, 2016 | 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 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 4, 2015 | Dec 2, 2015 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 18, 2015 | Aug 17, 2015 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 29, 2015 | Jan 27, 2015 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 15, 2014 | Dec 12, 2014 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 5, 2014 | Jun 4, 2014 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2014 | May 30, 2014 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2014 | Jan 31, 2014 | 001-08519 |