| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 May 2023 | 09 May 2023 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2022 | 10 May 2022 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2021 | 11 May 2021 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2020 | 12 May 2020 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2019 | 14 May 2019 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2018 | 08 May 2018 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 May 2017 | 09 May 2017 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Nov 2016 | 28 Nov 2016 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Nov 2016 | 10 Nov 2016 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Dec 2015 | 30 Nov 2015 | 000-14690 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Dec 2014 | 01 Dec 2014 | 000-14690 |