| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | May 21, 2021 | May 15, 2021 | 001-11602 | |
| 4 | Open Document | Open Filing | Mar 4, 2021 | Mar 2, 2021 | 001-11602 | |
| 4 | Open Document | Open Filing | Feb 26, 2020 | Feb 24, 2020 | 001-11602 | |
| 3 | Open Document | Open Filing | Feb 14, 2020 | Feb 12, 2020 | 001-11602 |