| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 16 Feb 2022 | 14 Feb 2022 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Dec 2021 | 27 Dec 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Aug 2021 | 04 Aug 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Aug 2020 | 05 Aug 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Aug 2019 | 08 Aug 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Aug 2018 | 31 Jul 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Aug 2017 | 08 Aug 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Aug 2016 | 09 Aug 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jun 2016 | 10 Jun 2016 | 000-18548 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2016 | 06 May 2016 | 000-18548 |