| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 15, 2022 | Jun 14, 2022 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 8, 2022 | Jun 6, 2022 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 3, 2022 | Jun 1, 2022 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 2, 2022 | May 31, 2022 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 31, 2022 | May 27, 2022 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 27, 2022 | May 25, 2022 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 4, 2022 | May 2, 2022 | 000-31157 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 7, 2022 | Jan 3, 2022 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 4, 2022 | Jan 3, 2022 | 000-31157 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 15, 2021 | Mar 10, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 15, 2021 | Mar 11, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 11, 2021 | Mar 10, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 9, 2021 | Mar 8, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 5, 2021 | Mar 4, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 4, 2021 | Mar 3, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 3, 2021 | Mar 2, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 26, 2021 | Feb 25, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 6, 2021 | Jan 4, 2021 | 000-31157 |
| 4 | Open Document | Open Filing | 4 | Jun 10, 2020 | Jun 9, 2020 | 000-31157 |
| 4 | Open Document | Open Filing | 4 | Jan 6, 2020 | Jan 2, 2020 | 000-31157 |
| 4 | Open Document | Open Filing | 4 | Aug 15, 2019 | Aug 14, 2019 | 000-31157 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2019 | May 9, 2019 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 7, 2019 | May 3, 2019 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2019 | Feb 12, 2019 | 001-11353 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 4, 2019 | Jan 2, 2019 | 000-31157 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2018 | Feb 12, 2018 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 9, 2018 | Feb 7, 2018 | 001-11353 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 3, 2018 | Jan 2, 2018 | 000-31157 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2017 | Feb 24, 2017 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 13, 2017 | Feb 9, 2017 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 9, 2017 | Feb 7, 2017 | 001-11353 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 3, 2017 | Jan 2, 2017 | 000-31157 |
| 4 | Open Document | Open Filing | FORM 4 - | Oct 3, 2016 | Nov 12, 2015 | 000-31157 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 8, 2016 | Aug 4, 2016 | 001-11353 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 6, 2016 | Jul 1, 2016 | 001-13779 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2016 | Mar 11, 2016 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 11, 2016 | Feb 9, 2016 | 001-11353 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 5, 2016 | Jan 4, 2016 | 000-31157 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 2, 2015 | Jul 1, 2015 | 001-13779 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 15, 2015 | Jun 11, 2015 | 001-13779 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2015 | May 19, 2015 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 13, 2015 | Mar 11, 2015 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 12, 2015 | Feb 10, 2015 | 001-11353 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 5, 2015 | Dec 31, 2014 | 000-31157 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 2, 2014 | Jul 1, 2014 | 001-13779 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 15, 2014 | May 13, 2014 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 12, 2014 | May 8, 2014 | 001-11353 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 2, 2014 | Apr 30, 2014 | 001-11353 |