| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 May 2021 | 20 May 2021 | 001-10879 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Oct 2020 | 23 Oct 2020 | 001-10879 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Sep 2020 | 03 Sep 2020 | 001-10879 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2020 | 21 May 2020 | 001-10879 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2020 | 21 May 2020 | 001-10879 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 May 2019 | 23 May 2019 | 001-10879 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2018 | 18 May 2018 | 001-10879 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2017 | 19 May 2017 | 001-10879 |
| 3/A | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Feb 2017 | 01 Feb 2017 | 001-10879 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Feb 2017 | 01 Feb 2017 | 001-10879 |