| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 17, 2023 | Jul 13, 2023 | 001-41698 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 24, 2022 | Jan 24, 2022 | 000-51378 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 22, 2020 | Jun 19, 2020 | 000-51378 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 10, 2018 | Dec 7, 2018 | 000-51378 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 11, 2018 | Jul 11, 2018 | 000-51378 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 8, 2016 | Jan 21, 2016 | 000-51378 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 29, 2015 | Oct 23, 2015 | 000-51378 |