| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Aug 30, 2021 | Aug 27, 2021 | 000-56132 | |
| 4 | Open Document | Open Filing | Apr 13, 2021 | Apr 12, 2021 | 000-56132 | |
| 4 | Open Document | Open Filing | Apr 6, 2021 | Apr 1, 2021 | 000-56132 | |
| 4/A | Open Document | Open Filing | Apr 5, 2021 | Aug 31, 2020 | 000-56132 | |
| 4 | Open Document | Open Filing | Sep 2, 2020 | Aug 31, 2020 | 000-56132 | |
| 4 | Open Document | Open Filing | Jun 29, 2020 | Jun 26, 2020 | 000-56132 | |
| 4 | Open Document | Open Filing | Apr 15, 2020 | Apr 13, 2020 | 000-56132 | |
| 4 | Open Document | Open Filing | Mar 31, 2020 | Mar 27, 2020 | 000-56132 | |
| 3 | Open Document | Open Filing | Feb 18, 2020 | Feb 18, 2020 | 000-56132 |