| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 30, 2021 | Aug 27, 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2021 | Mar 31, 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2021 | Mar 16, 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2021 | Mar 15, 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2021 | Mar 15, 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 24, 2020 | Nov 24, 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 12, 2020 | Nov 11, 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2020 | Jun 30, 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2020 | Mar 31, 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2020 | Mar 16, 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2020 | Mar 16, 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2020 | Mar 16, 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2019 | Dec 19, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2019 | Dec 19, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2019 | Dec 19, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2019 | Dec 19, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2019 | Dec 19, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 20, 2019 | Dec 19, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 22, 2019 | Aug 21, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 22, 2019 | Aug 21, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2019 | Jun 30, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 10, 2019 | Mar 31, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 18, 2019 | Mar 15, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 18, 2019 | Mar 15, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 18, 2019 | Mar 15, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2019 | Mar 15, 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 17, 2018 | May 31, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 5, 2018 | Jun 29, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2018 | Mar 31, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 26, 2018 | Mar 16, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 20, 2018 | Mar 15, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 20, 2018 | Mar 15, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 20, 2018 | Mar 15, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2018 | Mar 16, 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 2, 2017 | Sep 29, 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 5, 2017 | Jun 30, 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 24, 2017 | Apr 24, 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2017 | Mar 31, 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 21, 2017 | Mar 20, 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 20, 2017 | Mar 15, 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2016 | Sep 30, 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2016 | Jul 1, 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 6, 2016 | Apr 4, 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2016 | Mar 31, 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2016 | Mar 15, 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Nov 6, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Nov 6, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Nov 6, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Nov 6, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 1, 2015 | Sep 30, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 19, 2015 | Aug 19, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2015 | Jun 30, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2015 | Mar 31, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 25, 2015 | Mar 23, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 18, 2015 | Mar 17, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2015 | Mar 15, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2015 | Mar 15, 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 6, 2015 | Dec 31, 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 18, 2014 | Nov 13, 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 3, 2014 | Sep 30, 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2014 | Jun 30, 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2014 | Mar 31, 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 18, 2014 | Mar 15, 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2014 | Dec 31, 2013 | 000-28274 |