| 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 | 07 Dec 2021 | 03 Dec 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 | 10 Feb 2021 | 09 Feb 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Jul 2020 | 10 Jul 2020 | 000-18548 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Jul 2020 | 08 Jul 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Jul 2020 | 08 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 | 13 May 2020 | 12 May 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Jul 2019 | 29 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 | 09 Jul 2019 | 08 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 | 17 May 2019 | 17 May 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 | 09 Jul 2018 | 06 Jul 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 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2018 | 17 May 2018 | 000-18548 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Feb 2018 | 14 Feb 2018 | 000-18548 |