| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 23, 2021 | Aug 12, 2021 | 001-39128 |
| 4 | Open Document | Open Filing | Oct 9, 2020 | Oct 7, 2020 | 001-39128 | |
| 4 | Open Document | Open Filing | Nov 15, 2019 | Nov 13, 2019 | 001-39128 | |
| 3 | Open Document | Open Filing | Nov 7, 2019 | Nov 7, 2019 | 001-39128 |