| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 13, 2022 | Sep 13, 2022 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 16, 2022 | May 12, 2022 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 27, 2021 | May 25, 2021 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 26, 2020 | May 21, 2020 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 23, 2019 | May 21, 2019 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 24, 2018 | May 22, 2018 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 6, 2018 | Apr 4, 2018 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 19, 2017 | May 17, 2017 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 20, 2017 | Jan 17, 2017 | 001-34785 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 18, 2016 | May 16, 2016 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 6, 2016 | Apr 4, 2016 | 001-34785 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 4, 2016 | Apr 4, 2016 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 21, 2015 | May 19, 2015 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 23, 2015 | Jan 22, 2015 | 001-34785 | 
| 4 | Open Document | Open Filing | FORM 4 | Oct 2, 2014 | Sep 30, 2014 | 001-34785 | 
| 4 | Open Document | Open Filing | FORM 4 | Jul 2, 2014 | Jun 30, 2014 | 001-34785 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 23, 2014 | May 21, 2014 | 001-35886 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 2, 2014 | Mar 31, 2014 | 001-34785 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 24, 2014 | Feb 20, 2014 | 001-34785 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 3, 2014 | Jan 3, 2014 | 001-34785 |