| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Oct 26, 2021 | Oct 20, 2021 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 14, 2021 | Oct 12, 2021 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 30, 2020 | Oct 27, 2020 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 14, 2020 | Oct 12, 2020 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 28, 2019 | Oct 24, 2019 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 8, 2019 | Oct 7, 2019 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 30, 2018 | Oct 26, 2018 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 10, 2018 | Oct 8, 2018 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 31, 2017 | Oct 27, 2017 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 11, 2017 | Oct 9, 2017 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 1, 2016 | Oct 28, 2016 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 12, 2016 | Oct 10, 2016 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 27, 2015 | Oct 23, 2015 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 14, 2015 | Oct 12, 2015 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 28, 2014 | Oct 24, 2014 | 000-06936 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 15, 2014 | Oct 13, 2014 | 000-06936 |
| 3 | Open Document | Open Filing | FORM 3 | Sep 11, 2014 | Sep 1, 2014 | 000-06936 |