| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 27 May 2021 | 20 Aug 2020 | 000-55908 |
| 4 | Open Document | Open Filing | 30 Jun 2020 | 26 Jun 2020 | 001-37823 | |
| 4 | Open Document | Open Filing | 31 Mar 2020 | 31 Mar 2020 | 001-37823 | |
| 4 | Open Document | Open Filing | 02 Jan 2020 | 31 Dec 2019 | 001-37823 | |
| 3 | Open Document | Open Filing | FORM 3 | 21 Nov 2019 | 18 Nov 2019 | 000-55908 |
| 4 | Open Document | Open Filing | 01 Oct 2019 | 30 Sep 2019 | 001-37823 | |
| 4/A | Open Document | Open Filing | 19 Sep 2019 | 13 Sep 2019 | 001-37823 | |
| 4 | Open Document | Open Filing | 16 Sep 2019 | 13 Sep 2019 | 001-37823 | |
| 4 | Open Document | Open Filing | 09 Sep 2019 | 05 Sep 2019 | 001-37823 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Jul 2019 | 28 Jun 2019 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 May 2019 | 30 Apr 2019 | 001-37823 |
| 4 | Open Document | Open Filing | 01 Apr 2019 | 29 Mar 2019 | 001-37823 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Jan 2019 | 31 Dec 2018 | 001-37823 |
| 4 | Open Document | Open Filing | 13 Nov 2018 | 08 Nov 2018 | 001-37823 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Oct 2018 | 28 Sep 2018 | 001-37823 |
| 4 | Open Document | Open Filing | 03 Jul 2018 | 29 Jun 2018 | 001-37823 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2018 | 30 Mar 2018 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Jan 2018 | 31 Dec 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Nov 2017 | 15 Nov 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Oct 2017 | 29 Sep 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Aug 2017 | 01 Aug 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Jul 2017 | 07 Jul 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Jul 2017 | 30 Jun 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Jun 2017 | 26 Jun 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 Jun 2017 | 06 Jun 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2017 | 31 Mar 2017 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Jan 2017 | 31 Dec 2016 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Oct 2016 | 03 Oct 2016 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Jul 2016 | 18 Jul 2016 | 001-37823 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 May 2016 | 29 Apr 2016 | 000-54801 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Jul 2015 | 16 Jul 2015 | 000-54801 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Nov 2014 | 21 Nov 2014 | 000-54801 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Sep 2014 | 08 Sep 2014 | 000-54801 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Sep 2014 | 04 Sep 2014 | 000-54801 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Apr 2014 | 22 Apr 2014 | 000-54801 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Mar 2014 | 18 Mar 2014 | 000-54801 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2014 | 11 Feb 2014 | 000-54801 |