| 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 | Mar 19, 2021 | Mar 17, 2021 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 8, 2021 | Mar 4, 2021 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 8, 2021 | Mar 4, 2021 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 2, 2020 | Oct 29, 2020 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 19, 2020 | Mar 17, 2020 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 13, 2020 | Mar 11, 2020 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 27, 2020 | Feb 25, 2020 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 19, 2019 | Mar 15, 2019 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 11, 2019 | Mar 7, 2019 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 21, 2019 | Feb 19, 2019 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 30, 2018 | Nov 29, 2018 | 001-06732 |
| 4/A | Open Document | Open Filing | FORM 4/A | Oct 5, 2018 | Oct 1, 2018 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 3, 2018 | Oct 1, 2018 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 20, 2018 | Mar 19, 2018 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 12, 2018 | Mar 8, 2018 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 21, 2017 | Mar 17, 2017 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 6, 2017 | Mar 2, 2017 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 21, 2016 | Mar 17, 2016 | 001-06732 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 7, 2016 | Mar 3, 2016 | 001-06732 |
| 3 | Open Document | Open Filing | FORM 3 | May 12, 2015 | May 7, 2015 | 001-06732 |