| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 20 May 2022 | 17 May 2022 | 000-33411 | |
| 4 | Open Document | Open Filing | 07 Dec 2021 | 06 Dec 2021 | 000-33411 | |
| 4 | Open Document | Open Filing | 02 Sep 2021 | 01 Sep 2021 | 000-33411 | |
| 4 | Open Document | Open Filing | 28 May 2021 | 27 May 2021 | 000-33411 | |
| 4 | Open Document | Open Filing | 18 Dec 2020 | 17 Dec 2020 | 000-33411 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Mar 2018 | 16 Mar 2018 | 000-33411 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Dec 2017 | 20 Dec 2017 | 000-33411 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jan 2013 | 28 Dec 2012 | 000-33411 |