| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 19 May 2021 | 17 May 2021 | 001-33997 | |
| 4 | Open Document | Open Filing | 09 Dec 2020 | 18 Nov 2020 | 001-33997 | |
| 4 | Open Document | Open Filing | 07 Jul 2020 | 03 Jul 2020 | 001-33997 | |
| 3 | Open Document | Open Filing | 09 Jan 2020 | 30 Dec 2019 | 001-33997 |