| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Dec 2021 | 03 Feb 2021 | 001-33997 |
| 4 | Open Document | Open Filing | 23 Nov 2020 | 12 Aug 2020 | 001-33997 | |
| 4 | Open Document | Open Filing | 27 Apr 2020 | 09 Mar 2020 | 001-33997 | |
| 4 | Open Document | Open Filing | 25 Nov 2019 | 14 Feb 2019 | 001-33997 | |
| 4 | Open Document | Open Filing | 15 Aug 2018 | 11 Aug 2018 | 001-33997 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Mar 2018 | 02 Feb 2018 | 001-33997 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 22 May 2017 | 18 May 2017 | 001-33997 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 24 Mar 2017 | 22 Mar 2017 | 001-33997 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 10 Mar 2017 | 10 Aug 2016 | 001-33997 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 18 Nov 2016 | 17 Nov 2016 | 001-33997 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 11 Mar 2016 | 17 Aug 2015 | 001-33997 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 12 Mar 2015 | 02 Feb 2015 | 001-33997 |
| 5 | Open Document | Open Filing | ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP | 12 Mar 2015 | 31 Dec 2014 | 001-33997 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 13 Mar 2014 | 03 Sep 2013 | 001-33997 |