| 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 | Feb 3, 2021 | Feb 1, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 15, 2021 | Jan 13, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 3, 2020 | Dec 1, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 4, 2020 | Nov 2, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 5, 2020 | Oct 1, 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 21, 2020 | Jul 17, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 3, 2020 | Jun 1, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | May 11, 2020 | May 7, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 30, 2020 | Apr 28, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 25, 2020 | Feb 21, 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 SUBMISSION | Feb 3, 2017 | Feb 1, 2017 | 000-26427 |
| 3/A | Open Document | Open Filing | FORM 3/A SUBMISSION | Oct 31, 2016 | Aug 2, 2016 | 000-26427 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Aug 12, 2016 | Aug 2, 2016 | 000-26427 |