| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 14 Sep 2021 | 10 Sep 2021 | 000-52522 | |
| 4 | Open Document | Open Filing | 25 Nov 2020 | 23 Nov 2020 | 000-52522 | |
| 4 | Open Document | Open Filing | 02 Nov 2020 | 30 Oct 2020 | 000-52522 | |
| 3 | Open Document | Open Filing | 09 Oct 2020 | 26 Jul 2017 | 000-52522 |