| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 25 May 2022 | 23 May 2022 | 000-21617 | |
| 4 | Open Document | Open Filing | 18 Aug 2020 | 16 Aug 2020 | 000-21617 | |
| 4 | Open Document | Open Filing | 22 Nov 2019 | 20 Nov 2019 | 000-21617 | |
| 4 | Open Document | Open Filing | 17 Dec 2018 | 04 Dec 2018 | 000-21617 | |
| 3/A | Open Document | Open Filing | 23 Jan 2018 | 02 Oct 2017 | 000-21617 | |
| 3 | Open Document | Open Filing | 05 Oct 2017 | 02 Oct 2017 | 000-21617 |