| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Jun 2021 | 08 Jun 2021 | 001-40468 |
| 4 | Open Document | Open Filing | FORM 4 | 11 Dec 2019 | 03 May 2018 | 000-27408 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Feb 2018 | 06 Feb 2018 | 001-37513 |
| 4 | Open Document | Open Filing | FORM 4 | 22 May 2017 | 18 May 2017 | 000-27408 |
| 4 | Open Document | Open Filing | FORM 4 | 22 May 2017 | 18 May 2017 | 000-27408 |
| 4/A | Open Document | Open Filing | FORM 4/A | 27 Apr 2017 | 31 May 2016 | 000-27408 |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jan 2017 | 31 May 2016 | 000-27408 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Jul 2016 | 19 Jul 2016 | 001-37513 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Apr 2015 | 03 Apr 2015 | 000-27408 |
| 3 | Open Document | Open Filing | FORM 3 | 21 Feb 2014 | 02 Jan 2013 | 000-27408 |