| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2021 | Jul 1, 2021 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 5, 2021 | Apr 1, 2021 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 6, 2021 | Jan 4, 2021 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 5, 2020 | Oct 1, 2020 | 001-12597 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2020 | Jul 1, 2020 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2020 | Jul 1, 2020 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2020 | Apr 1, 2020 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 6, 2020 | Jan 2, 2020 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 2, 2019 | Oct 1, 2019 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 3, 2019 | Jul 1, 2019 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2019 | Apr 1, 2019 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2018 | Oct 1, 2018 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2017 | Oct 2, 2017 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 16, 2016 | Nov 14, 2016 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2016 | Oct 3, 2016 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 9, 2016 | Sep 7, 2016 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 21, 2016 | Jul 20, 2016 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 27, 2016 | Jun 23, 2016 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 1, 2015 | Oct 1, 2015 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 2, 2014 | Oct 1, 2014 | 001-12597 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 22, 2014 | Sep 19, 2014 | 001-12597 |