| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2021 | 18 May 2021 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Feb 2021 | 01 Feb 2021 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jan 2021 | 22 Jan 2021 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jan 2020 | 22 Jan 2020 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jan 2020 | 02 Jan 2020 | 000-51515 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Apr 2019 | 23 Jan 2019 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Jan 2019 | 23 Jan 2019 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2018 | 22 May 2018 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jan 2018 | 22 Jan 2018 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Mar 2017 | 16 Jun 2016 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Feb 2017 | 23 Jan 2017 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Feb 2016 | 20 Jan 2016 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Jan 2016 | 04 Jan 2016 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Oct 2015 | 09 Oct 2015 | 000-51515 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Mar 2015 | 19 Feb 2014 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Mar 2015 | 09 Mar 2015 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Jan 2015 | 21 Jan 2015 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Jun 2014 | 19 Jun 2014 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Mar 2014 | 11 Mar 2014 | 000-51515 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Feb 2014 | 19 Feb 2014 | 000-51515 |