| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 10, 2021 | May 1, 2021 | 001-39680 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 16, 2021 | Jun 10, 2021 | 001-39680 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2021 | May 1, 2021 | 001-39680 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 11, 2021 | Mar 9, 2021 | 001-39680 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 12, 2021 | Dec 31, 2020 | 001-39680 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2020 | May 1, 2020 | 000-10587 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2020 | Dec 31, 2019 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2019 | May 17, 2019 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 3, 2019 | May 1, 2019 | 000-10587 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2019 | Dec 31, 2018 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2018 | Apr 1, 2018 | 000-10587 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2018 | Dec 31, 2017 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 24, 2017 | Jul 21, 2017 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2017 | Apr 2, 2017 | 000-10587 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2017 | Dec 31, 2016 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 21, 2016 | Nov 17, 2016 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 14, 2016 | Jun 21, 2016 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 5, 2016 | Apr 1, 2016 | 000-10587 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 16, 2016 | Dec 31, 2015 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 27, 2015 | Jun 15, 2015 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2015 | Mar 20, 2015 | 000-10587 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 23, 2015 | Dec 31, 2014 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 24, 2014 | Nov 21, 2014 | 000-10587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 3, 2014 | Mar 21, 2014 | 000-10587 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 28, 2014 | Dec 31, 2013 | 000-10587 |