| 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 | Jul 13, 2021 | Jul 9, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 11, 2021 | Jun 9, 2021 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 12, 2020 | Jun 10, 2020 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 14, 2019 | Jun 12, 2019 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 13, 2018 | Jun 11, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 5, 2018 | Jun 1, 2018 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 9, 2017 | Aug 7, 2017 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 16, 2017 | Jun 14, 2017 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 3, 2017 | Mar 31, 2017 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 15, 2016 | Jun 13, 2016 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 17, 2016 | Mar 15, 2016 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 29, 2016 | Feb 25, 2016 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 19, 2015 | Jun 17, 2015 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 15, 2015 | May 13, 2015 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 14, 2014 | Nov 12, 2014 | 000-26427 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 13, 2014 | Jun 11, 2014 | 000-26427 |