| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Feb 10, 2023 | Feb 9, 2023 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 7, 2022 | Mar 3, 2022 | 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 10, 2020 | Nov 6, 2020 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 3, 2020 | Nov 1, 2020 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 22, 2020 | May 20, 2020 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2020 | Feb 12, 2020 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2020 | Feb 6, 2020 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 15, 2019 | Nov 13, 2019 | 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 | Aug 21, 2019 | Aug 19, 2019 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 20, 2019 | Feb 19, 2019 | 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 | May 17, 2017 | May 15, 2017 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2017 | Feb 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 | Aug 8, 2016 | Aug 4, 2016 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 3, 2016 | Aug 1, 2016 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 25, 2016 | May 24, 2016 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2016 | Feb 1, 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 | Aug 3, 2015 | Jul 30, 2015 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 7, 2015 | May 6, 2015 | 000-17795 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2015 | Feb 3, 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 |