| 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 | Apr 7, 2021 | Apr 5, 2021 | 001-35886 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 7, 2020 | Apr 5, 2020 | 001-35886 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 | Dec 31, 2019 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 31, 2019 | Dec 27, 2019 | 001-35886 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | Aug 15, 2019 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 15, 2019 | Aug 13, 2019 | 001-35886 |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Apr 15, 2019 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 9, 2019 | Apr 5, 2019 | 001-35886 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 9, 2018 | Apr 5, 2018 | 001-35886 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 1, 2017 | Nov 29, 2017 | 001-35886 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | Dec 1, 2017 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 7, 2017 | Apr 5, 2017 | 001-35886 |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Nov 15, 2016 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 15, 2016 | Nov 10, 2016 | 001-35886 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 25, 2016 | Oct 21, 2016 | 001-35886 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 | Oct 25, 2016 | ||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | Apr 6, 2016 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 6, 2016 | Apr 4, 2016 | 001-35886 |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Apr 14, 2015 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 6, 2015 | Apr 4, 2015 | 001-35886 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 8, 2014 | Apr 4, 2014 | 001-35886 |