| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 14, 2021 | Jun 10, 2021 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 31, 2021 | Mar 30, 2021 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 17, 2021 | Feb 12, 2021 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 26, 2021 | Jan 22, 2021 | 001-12252 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 13, 2020 | Dec 31, 2019 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 12, 2020 | Feb 10, 2020 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 6, 2020 | Feb 4, 2020 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2020 | Jan 31, 2020 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 21, 2020 | Jan 16, 2020 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 28, 2019 | Oct 24, 2019 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 12, 2019 | Aug 9, 2019 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 8, 2019 | Aug 6, 2019 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2019 | Feb 5, 2019 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2019 | Feb 1, 2019 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 22, 2019 | Jan 17, 2019 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 30, 2018 | Oct 29, 2018 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2018 | Feb 7, 2018 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2018 | Feb 1, 2018 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2017 | Feb 7, 2017 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 6, 2017 | Feb 2, 2017 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2016 | Feb 9, 2016 | 001-12252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2016 | Feb 4, 2016 | 001-12252 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 28, 2015 | Dec 17, 2015 | 001-12252 |