| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 31 Dec 2024 | 27 Dec 2024 | 001-08266 | |
| 4 | Open Document | Open Filing | 17 Jan 2023 | 12 Jan 2023 | 001-08266 | |
| 4 | Open Document | Open Filing | 18 Feb 2022 | 16 Feb 2022 | 001-08266 | |
| 4 | Open Document | Open Filing | 26 Jan 2022 | 24 Jan 2022 | 001-08266 | |
| 4 | Open Document | Open Filing | 11 Dec 2020 | 09 Dec 2020 | 001-08266 | |
| 3 | Open Document | Open Filing | 23 Sep 2020 | 16 Sep 2020 | 001-08266 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Apr 2019 | 03 Apr 2019 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 31 Jan 2018 | 29 Jan 2018 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 Feb 2017 | 03 Feb 2017 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Jan 2016 | 23 Dec 2015 | 001-37481 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 Feb 2015 | 05 Feb 2015 | 000-54710 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Dec 2014 | 11 Dec 2014 | 000-54710 |
| 4 | Open Document | Open Filing | 4 | 18 Mar 2014 | 14 Mar 2014 | 000-54710 |
| 4 | Open Document | Open Filing | 4 | 14 Feb 2014 | 12 Feb 2014 | 000-54710 |
| 4/A | Open Document | Open Filing | 4/A | 03 Feb 2014 | 16 Dec 2013 | 000-54710 |
| 4 | Open Document | Open Filing | 4 | 18 Dec 2013 | 16 Dec 2013 | 000-54710 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2013 | 12 Feb 2013 | 000-54710 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 26 Nov 2012 | 21 Nov 2012 | 000-54710 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 26 Nov 2012 | 21 Nov 2012 | 000-54710 |