| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 17, 2022 | Feb 15, 2022 | 000-17706 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2022 | Dec 31, 2021 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 17, 2021 | Feb 15, 2021 | 000-17706 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2021 | Feb 8, 2021 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2021 | Feb 8, 2021 | 000-17706 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 27, 2021 | Dec 31, 2020 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2020 | Feb 14, 2020 | 000-17706 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 16, 2020 | Dec 31, 2019 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 17, 2019 | Dec 16, 2019 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2019 | Feb 15, 2019 | 000-17706 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 29, 2019 | Dec 31, 2018 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 21, 2018 | Feb 20, 2018 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2018 | Feb 2, 2018 | 000-17706 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 9, 2018 | Dec 31, 2017 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 16, 2017 | Feb 15, 2017 | 000-17706 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 10, 2017 | Dec 31, 2016 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 16, 2016 | Feb 15, 2016 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 29, 2015 | Jun 26, 2015 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 30, 2015 | Jan 29, 2015 | 000-17706 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 30, 2015 | Jan 29, 2015 | 000-17706 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 19, 2014 | Sep 8, 2014 | 000-17706 |