| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 19, 2022 | Jul 18, 2022 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 1, 2021 | Sep 30, 2021 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2021 | Jun 30, 2021 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 18, 2021 | May 17, 2021 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2021 | May 10, 2021 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 6, 2021 | May 5, 2021 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 26, 2021 | Mar 24, 2021 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 7, 2020 | May 5, 2020 | 000-18032 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 12, 2020 | Aug 2, 2019 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 6, 2019 | Aug 2, 2019 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 8, 2019 | May 6, 2019 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 9, 2018 | May 7, 2018 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 21, 2018 | Mar 14, 2018 | 000-18032 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 21, 2018 | Mar 14, 2018 | 000-18032 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2017 | Jul 5, 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 3, 2017 | Jul 1, 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 12, 2017 | May 11, 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 9, 2017 | May 8, 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 11, 2016 | Aug 11, 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2016 | Jul 1, 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2016 | May 12, 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 17, 2016 | Feb 16, 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 12, 2016 | Jan 10, 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 17, 2015 | Nov 16, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 18, 2015 | Aug 17, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 16, 2015 | Jul 15, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2015 | Jul 2, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 2, 2015 | Jul 1, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 15, 2015 | May 13, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 6, 2015 | May 5, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 27, 2015 | Jan 26, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 12, 2015 | Jan 10, 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 8, 2014 | Jul 5, 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 3, 2014 | Jul 1, 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 16, 2014 | May 14, 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 13, 2014 | Jan 10, 2014 | 000-18548 |