| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Jun 9, 2021 | Jun 4, 2021 | 001-10647 | |
| 4 | Open Document | Open Filing | Sep 17, 2019 | Sep 5, 2019 | 001-10647 | |
| 3 | Open Document | Open Filing | Jul 8, 2019 | Jul 1, 2019 | 001-10647 |