| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 17, 2022 | Aug 15, 2022 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 17, 2021 | Aug 15, 2021 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 19, 2020 | Nov 17, 2020 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 5, 2020 | Oct 1, 2020 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 20, 2020 | May 6, 2020 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2020 | Feb 5, 2020 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 31, 2019 | Oct 30, 2019 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2019 | Apr 1, 2019 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 19, 2018 | Sep 17, 2018 | 001-34951 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 26, 2018 | Feb 14, 2018 | 001-34951 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 23, 2018 | Feb 13, 2018 | 001-34951 |