| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 11, 2022 | Jul 8, 2022 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 11, 2022 | Apr 8, 2022 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 14, 2022 | Mar 11, 2022 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 8, 2022 | Mar 4, 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 | Nov 19, 2021 | Nov 17, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2021 | Nov 5, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 12, 2021 | Oct 8, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 11, 2021 | Aug 9, 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 | May 26, 2021 | May 25, 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 | Mar 16, 2021 | Mar 12, 2021 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 8, 2021 | Mar 4, 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 | Aug 11, 2020 | Aug 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 21, 2020 | May 19, 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 | Mar 16, 2020 | Mar 12, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 6, 2020 | Mar 4, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 28, 2020 | Feb 26, 2020 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2020 | Feb 21, 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 | Jan 3, 2020 | Jan 1, 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 | Aug 13, 2019 | Aug 9, 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 | Apr 15, 2019 | Apr 12, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 14, 2019 | Mar 12, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2019 | Mar 1, 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 | Jan 3, 2019 | Jan 1, 2019 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 27, 2018 | Nov 24, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 16, 2018 | Oct 12, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 13, 2018 | Aug 9, 2018 | 000-16211 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 13, 2018 | Jul 13, 2018 | 000-16211 |
| 3/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 5, 2018 | Jun 27, 2018 | 000-16211 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 27, 2018 | Jun 27, 2018 | 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 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 10, 2017 | Jul 1, 2017 | 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 | Jan 5, 2016 | Jan 1, 2016 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 27, 2015 | Nov 24, 2015 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 5, 2015 | Jan 1, 2015 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 28, 2014 | Nov 25, 2014 | 000-22673 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 3, 2014 | Jan 2, 2014 | 000-22673 |