| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | May 2, 2022 | Apr 28, 2022 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 5, 2022 | Jan 4, 2022 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 2, 2021 | Dec 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 5, 2021 | Nov 3, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 2, 2021 | Nov 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 5, 2021 | Oct 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 2, 2021 | Sep 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 3, 2021 | Aug 2, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 2, 2021 | Jul 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 21, 2021 | Jun 17, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 14, 2021 | Jun 10, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 3, 2021 | Jun 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | May 4, 2021 | May 3, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 26, 2021 | Apr 22, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 5, 2021 | Apr 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 2, 2021 | Mar 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 10, 2021 | Feb 9, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 2, 2021 | Feb 1, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 6, 2021 | Jan 4, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 11, 2020 | Dec 10, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 8, 2020 | Dec 4, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 2, 2020 | Dec 1, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 18, 2020 | Nov 17, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 10, 2020 | Nov 6, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 4, 2020 | Nov 3, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 3, 2020 | Nov 2, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 26, 2020 | Oct 22, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 12, 2020 | Aug 10, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 27, 2020 | Apr 23, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 7, 2020 | Feb 6, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 23, 2019 | Dec 19, 2019 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 12, 2019 | Dec 11, 2019 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 30, 2019 | Apr 26, 2019 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 17, 2019 | Apr 16, 2019 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 27, 2019 | Feb 25, 2019 | 000-20388 |
| 5 | Open Document | Open Filing | FORM 5 | Feb 6, 2019 | Dec 29, 2018 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 6, 2018 | Sep 4, 2018 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 4, 2018 | Aug 31, 2018 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | May 1, 2018 | Apr 27, 2018 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 19, 2018 | Jan 17, 2018 | 000-20388 |
| 3 | Open Document | Open Filing | FORM 3 | Jan 19, 2018 | Jan 17, 2018 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 18, 2018 | Jan 17, 2018 | 000-26124 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 30, 2017 | ||
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 6, 2017 | Jun 5, 2017 | 000-26124 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 29, 2016 | Aug 26, 2016 | 000-26124 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 28, 2015 | Aug 28, 2015 | 000-26124 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 29, 2014 | Aug 28, 2014 | 000-26124 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 28, 2014 | Feb 28, 2014 | 000-26124 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 12, 2014 | Feb 11, 2014 | 000-26124 |