| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Aug 2021 | 15 Aug 2021 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Aug 2020 | 15 Aug 2020 | 001-34951 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Aug 2019 | 15 Aug 2019 | 001-34951 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2019 | 11 Feb 2019 | 001-34951 |