| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Jan 5, 2022 | Jan 3, 2022 | 001-35813 | |
| 5 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 15, 2021 | Aug 31, 2021 | 001-35813 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 14, 2020 | Jan 8, 2020 | 001-35813 |
| 4 | Open Document | Open Filing | Aug 13, 2018 | Aug 9, 2018 | 001-35813 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 5, 2017 | Jun 30, 2017 | 001-35813 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 2, 2017 | Feb 9, 2017 | 001-35813 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 8, 2016 | Aug 30, 2016 | 001-35813 |