| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 10, 2021 | May 24, 2021 | 001-38302 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 10, 2021 | May 24, 2021 | 001-38302 |
| 4 | Open Document | Open Filing | 4 | Oct 27, 2020 | Oct 23, 2020 | 000-12104 |
| 4 | Open Document | Open Filing | 4 | Sep 10, 2019 | Sep 6, 2019 | 000-12104 |
| 4 | Open Document | Open Filing | 4 | Apr 4, 2019 | Apr 4, 2019 | 000-12104 |
| 4 | Open Document | Open Filing | 4 | Mar 18, 2019 | Mar 14, 2019 | 000-12104 |
| 4 | Open Document | Open Filing | Sep 18, 2018 | Sep 14, 2018 | 000-12104 | |
| 3 | Open Document | Open Filing | 3 | Sep 7, 2018 | Aug 23, 2018 | 000-12104 |