| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Dec 2021 | 13 Dec 2021 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | 12 Mar 2021 | 11 Mar 2021 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | 26 Feb 2020 | 26 Feb 2020 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | 08 Mar 2019 | 06 Mar 2019 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | 09 Mar 2018 | 07 Mar 2018 | 001-06651 |
| 4 | Open Document | Open Filing | FORM 4 | 16 Mar 2017 | 14 Mar 2017 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Sep 2016 | 19 Sep 2016 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Mar 2016 | 16 Mar 2016 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2015 | 05 Mar 2015 | 001-06651 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Mar 2014 | 10 Mar 2014 | 001-06651 |