| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Dec 1, 2021 | Nov 30, 2021 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 17, 2021 | May 13, 2021 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 10, 2020 | Jun 9, 2020 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 18, 2020 | May 14, 2020 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 20, 2019 | May 17, 2019 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 13, 2019 | May 9, 2019 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 15, 2018 | May 14, 2018 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 4, 2018 | May 3, 2018 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 10, 2017 | May 10, 2017 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 8, 2017 | May 4, 2017 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 28, 2016 | Jul 28, 2016 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 9, 2016 | May 5, 2016 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 22, 2015 | May 20, 2015 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 8, 2015 | May 7, 2015 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 28, 2014 | Jul 25, 2014 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | May 9, 2014 | May 8, 2014 | 001-06732 |