| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Feb 2024 | 23 Feb 2024 | 001-35518 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 26 Feb 2024 | 22 Feb 2024 | 001-35518 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Feb 2023 | 23 Feb 2023 | 001-35518 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 Feb 2023 | 22 Feb 2023 | 001-35518 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 Feb 2022 | 22 Feb 2022 | 001-35518 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Feb 2022 | 19 Feb 2022 | 001-35518 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Aug 2021 | 11 Aug 2021 | 001-35518 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Feb 2021 | 19 Feb 2021 | 001-35518 |
| 4 | Open Document | Open Filing | 4 | 25 Feb 2020 | 21 Feb 2020 | 001-35518 |
| 4 | Open Document | Open Filing | 4 | 24 Jun 2019 | 20 Jun 2019 | 001-35518 |
| 4 | Open Document | Open Filing | 4 | 29 Apr 2019 | 25 Apr 2019 | 001-35518 |
| 4/A | Open Document | Open Filing | 4/A | 04 Mar 2019 | 22 Feb 2019 | 001-35518 |
| 4 | Open Document | Open Filing | 4 | 04 Mar 2019 | 20 Aug 2018 | 001-35518 |
| 4 | Open Document | Open Filing | 4 | 26 Feb 2019 | 22 Feb 2019 | 001-35518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Mar 2018 | 22 Mar 2018 | 001-36480 |
| 4 | Open Document | Open Filing | 4 | 27 Feb 2018 | 23 Feb 2018 | 001-35518 |
| 4 | Open Document | Open Filing | 4 | 15 Jun 2017 | 13 Jun 2017 | 001-35518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jun 2017 | 01 Jun 2017 | 001-36480 |
| 4 | Open Document | Open Filing | 4 | 27 Feb 2017 | 24 Feb 2017 | 001-35518 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jun 2016 | 09 Jun 2016 | 001-36480 |
| 4 | Open Document | Open Filing | 4 | 03 Mar 2016 | 01 Mar 2016 | 001-35518 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Nov 2015 | 12 Nov 2015 | 001-36480 |
| 4 | Open Document | Open Filing | 4 | 05 Mar 2015 | 03 Mar 2015 | 001-35518 |
| 4 | Open Document | Open Filing | 4 | 13 Jan 2015 | 16 Dec 2014 | 001-35518 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 22 Apr 2014 | 18 Apr 2014 | 000-28402 |
| 4 | Open Document | Open Filing | 4 | 23 Jan 2014 | 12 Dec 2013 | 001-35518 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Jun 2013 | 22 May 2013 | 000-28402 |
| 4 | Open Document | Open Filing | 25 Mar 2013 | 21 Mar 2013 | 001-35518 | |
| 4 | Open Document | Open Filing | 07 Feb 2013 | 05 Feb 2013 | 001-35518 | |
| 4 | Open Document | Open Filing | 17 Dec 2012 | 14 Dec 2012 | 001-35518 | |
| 4 | Open Document | Open Filing | 05 Dec 2012 | 04 Dec 2012 | 001-35518 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 01 Jun 2012 | 25 May 2012 | 000-28402 |
| 4 | Open Document | Open Filing | FORM 4 - | 07 May 2012 | 04 May 2012 | 001-35518 |
| 3 | Open Document | Open Filing | FORM 3 - | 30 Apr 2012 | 30 Apr 2012 | 001-35518 |