| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 15, 2021 | Dec 13, 2021 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 12, 2021 | Mar 11, 2021 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 26, 2020 | Feb 26, 2020 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 8, 2019 | Mar 6, 2019 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 9, 2018 | Mar 7, 2018 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 16, 2017 | Mar 14, 2017 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 20, 2016 | Sep 19, 2016 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 18, 2016 | Mar 16, 2016 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 9, 2015 | Mar 5, 2015 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 12, 2014 | Mar 10, 2014 | 001-06651 |