| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2021 | Nov 7, 2021 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 13, 2021 | Sep 10, 2021 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2021 | Jun 29, 2021 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 29, 2021 | Jun 25, 2021 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 4, 2021 | Mar 3, 2021 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 3, 2020 | Nov 1, 2020 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2020 | Feb 3, 2020 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 8, 2019 | Nov 6, 2019 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2019 | Nov 2, 2019 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2018 | Nov 7, 2018 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2018 | Nov 4, 2018 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 2, 2017 | Nov 1, 2017 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2017 | Oct 1, 2017 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 4, 2016 | Nov 2, 2016 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 2, 2016 | Oct 31, 2016 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2016 | Oct 2, 2016 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Nov 4, 2015 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 6, 2015 | Oct 3, 2015 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 27, 2015 | May 22, 2015 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2015 | May 19, 2015 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 6, 2015 | May 4, 2015 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 7, 2014 | Oct 5, 2014 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2014 | Oct 1, 2014 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 26, 2014 | Jun 24, 2014 | 000-17795 |