| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 11, 2022 | Apr 8, 2022 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 19, 2022 | Jan 14, 2022 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 12, 2021 | Oct 8, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 13, 2021 | Jul 9, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2021 | May 27, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 12, 2021 | Apr 9, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 12, 2021 | Jan 8, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 13, 2020 | Oct 9, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 10, 2020 | Jul 10, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 22, 2020 | May 21, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 14, 2020 | Apr 10, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 14, 2020 | Jan 10, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 16, 2019 | Oct 11, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 16, 2019 | Jul 12, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 29, 2019 | May 24, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 15, 2019 | Apr 12, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 15, 2019 | Jan 11, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 16, 2018 | Oct 12, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 13, 2018 | Jul 13, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 24, 2018 | May 23, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 15, 2018 | May 11, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 13, 2018 | Apr 13, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 16, 2018 | Jan 12, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 21, 2017 | Nov 21, 2017 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 17, 2017 | Oct 13, 2017 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 18, 2017 | Jul 14, 2017 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 26, 2017 | May 24, 2017 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 18, 2017 | Apr 14, 2017 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 21, 2017 | Feb 17, 2017 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 17, 2017 | Jan 13, 2017 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 12, 2016 | Dec 8, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 18, 2016 | Oct 14, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 12, 2016 | Jul 8, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 27, 2016 | May 25, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 12, 2016 | Apr 8, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 31, 2016 | Mar 29, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2016 | Mar 14, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 2, 2016 | Feb 29, 2016 | 000-16211 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 1, 2016 | Feb 29, 2016 | 000-16211 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 1, 2016 | Feb 29, 2016 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 14, 2015 | May 12, 2015 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 18, 2015 | Feb 13, 2015 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 15, 2014 | May 13, 2014 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 12, 2014 | Mar 10, 2014 | 000-22673 |