| 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 | 03 Aug 2021 | 03 Aug 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jul 2021 | 10 Jul 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jul 2021 | 02 Jul 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2021 | 13 May 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jul 2020 | 10 Jul 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Jul 2020 | 02 Jul 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 May 2020 | 27 May 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2020 | 12 May 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Jul 2019 | 30 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Jul 2019 | 10 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jul 2019 | 05 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2019 | 03 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jul 2019 | 02 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jul 2019 | 01 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2019 | 16 May 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Aug 2018 | 29 Aug 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Aug 2018 | 23 Aug 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jul 2018 | 03 Jul 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2018 | 01 Jul 2018 | 000-18548 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Apr 2018 | 26 Mar 2018 | 000-18548 |