| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 29 Nov 2021 | 23 Nov 2021 | 000-27039 | |
| 4 | Open Document | Open Filing | 14 Sep 2021 | 10 Sep 2021 | 000-27039 | |
| 4 | Open Document | Open Filing | 28 May 2020 | 14 May 2020 | 000-27039 | |
| 4 | Open Document | Open Filing | 30 Apr 2020 | 09 Apr 2020 | 000-27039 | |
| 5 | Open Document | Open Filing | 30 Apr 2020 | 31 Dec 2019 | 000-27039 | |
| 3 | Open Document | Open Filing | 30 Apr 2020 | 31 Aug 2018 | 000-27039 | |
| 4 | Open Document | Open Filing | 01 Aug 2018 | 26 Jul 2018 | 000-55431 | |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2018 | 07 Feb 2018 | 000-55431 |
| 3/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2018 | 10 Jan 2018 | 000-55431 |
| 144 | Open Document | Open Filing | 30 Mar 2018 | |||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Mar 2018 | 07 Feb 2018 | 000-55431 |
| 3/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Mar 2018 | 10 Jan 2018 | 000-55431 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Jan 2018 | 10 Jan 2018 | 000-55431 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2017 | 27 Jan 2017 | 000-55431 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2017 | 27 Jan 2017 | 000-55431 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2017 | 27 Jan 2017 | 000-55431 |
| 5 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Jan 2017 | 31 Dec 2016 | 000-26108 |
| 5 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Jan 2017 | 31 Dec 2016 | 000-26108 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Jan 2017 | 27 Dec 2016 | 000-26108 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Jan 2017 | 27 Dec 2016 | 000-26108 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Dec 2015 | 09 Dec 2015 | 000-55431 |