| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2024 | 14 May 2024 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2023 | 16 May 2023 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2022 | 16 May 2022 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Aug 2021 | 05 Aug 2021 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2020 | 18 May 2020 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2019 | 20 May 2019 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2016 | 11 Feb 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Feb 2016 | 01 Feb 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 May 2015 | 04 May 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Apr 2015 | 22 Apr 2015 | 000-12508 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2015 | 04 Mar 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Mar 2015 | 04 Mar 2015 | 000-12508 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Mar 2015 | 04 Mar 2015 | 000-12508 |