| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Oct 7, 2021 | Oct 5, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 8, 2021 | Sep 3, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 5, 2021 | Aug 3, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 8, 2021 | Jul 6, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 15, 2021 | Jun 11, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 5, 2021 | Mar 3, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 5, 2021 | Feb 3, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 6, 2021 | Jan 4, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 10, 2020 | Dec 8, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 7, 2020 | Dec 3, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 5, 2020 | Nov 3, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 7, 2020 | Oct 5, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 3, 2020 | Sep 1, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 5, 2020 | Aug 3, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 22, 2020 | Jul 20, 2020 | 000-26427 |
| 4/A | Open Document | Open Filing | FORM 4/A | Jul 22, 2020 | Jul 1, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 6, 2020 | Jul 1, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 4, 2020 | Jan 31, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 5, 2019 | Jun 3, 2019 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 4, 2019 | Jan 31, 2019 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 3, 2018 | Oct 1, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 6, 2018 | Sep 4, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 2, 2018 | Aug 1, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 2, 2018 | Jul 2, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 13, 2018 | Jun 11, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 9, 2018 | Mar 7, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 6, 2018 | Mar 2, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 1, 2018 | Feb 27, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 2, 2018 | Jan 31, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Oct 26, 2017 | Oct 24, 2017 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 13, 2017 | Sep 11, 2017 | 000-26427 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Aug 2, 2017 | Jul 25, 2017 | 000-26427 |