| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 4 | 15 May 2025 | 14 May 2025 | 000-51237 |
| 4 | Open Document | Open Filing | 4 | 30 Aug 2024 | 29 Aug 2024 | 000-51237 |
| 4 | Open Document | Open Filing | 4 | 16 May 2024 | 14 May 2024 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 May 2023 | 11 May 2023 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 May 2022 | 12 May 2022 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2021 | 13 May 2021 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 19 May 2020 | 15 May 2020 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2019 | 16 May 2019 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2019 | 16 May 2019 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 May 2019 | 09 May 2019 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Feb 2019 | 21 Feb 2019 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Aug 2018 | 02 Aug 2018 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Aug 2018 | 31 Jul 2018 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2018 | 11 May 2018 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 May 2018 | 10 May 2018 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Aug 2017 | 02 Aug 2017 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 May 2017 | 11 May 2017 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Aug 2016 | 28 Jul 2016 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 May 2016 | 12 May 2016 | 000-51237 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Aug 2015 | 31 Jul 2015 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Aug 2015 | 31 Jul 2015 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jul 2015 | 30 Jun 2015 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 May 2015 | 14 May 2015 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 09 Mar 2015 | 05 Mar 2015 | 000-51237 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 09 Mar 2015 | 05 Mar 2015 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Oct 2014 | 24 Oct 2014 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Oct 2013 | 18 Oct 2013 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Oct 2012 | 19 Oct 2012 | 001-07635 |