| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | May 27, 2022 | May 25, 2022 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 20, 2021 | May 19, 2021 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2020 | May 20, 2020 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2020 | May 22, 2019 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2018 | Feb 23, 2018 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 22, 2017 | Dec 21, 2017 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2017 | Feb 23, 2017 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2016 | Feb 24, 2016 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 20, 2015 | Feb 19, 2015 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 24, 2014 | Feb 20, 2014 | 001-11848 |