| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Sep 2021 | 12 Sep 2021 | 001-35962 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Sep 2020 | 12 Sep 2020 | 001-35962 |
| 4 | Open Document | Open Filing | 26 Sep 2019 | 12 Sep 2019 | 001-35962 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Sep 2018 | 12 Sep 2018 | 001-35962 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Jul 2016 | 01 Jul 2016 | 001-35962 |