| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 19 May 2021 | 13 May 2021 | 001-32830 | |
| 4 | Open Document | Open Filing | 15 Jun 2020 | 19 Mar 2020 | 001-32830 | |
| 4 | Open Document | Open Filing | 12 Jun 2019 | 11 Jun 2019 | 001-32830 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Jul 2018 | 09 May 2018 | 001-32830 |