| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 17 Nov 2021 | 12 Nov 2021 | 000-55802 | |
| 4 | Open Document | Open Filing | 14 May 2021 | 12 May 2021 | 000-55802 | |
| 4 | Open Document | Open Filing | 17 Sep 2019 | 13 Sep 2019 | 000-55802 | |
| 4 | Open Document | Open Filing | 11 Feb 2019 | 08 Feb 2019 | 000-55802 | |
| 4 | Open Document | Open Filing | 04 Jan 2018 | 02 Jan 2018 | 000-55802 | |
| 3 | Open Document | Open Filing | 23 Jun 2017 | 23 Jun 2017 | 000-55802 |