| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 27, 2023 | Apr 25, 2023 | 000-55940 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 23, 2022 | Mar 22, 2022 | 000-55940 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 23, 2021 | Dec 23, 2021 | 000-55940 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 3, 2021 | Nov 30, 2021 | 000-55940 |
| 4 | Open Document | Open Filing | FORM 4 | May 17, 2021 | May 14, 2021 | 000-55940 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 15, 2021 | Apr 15, 2021 | 000-55940 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 9, 2021 | Mar 6, 2021 | 000-55940 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 21, 2020 | Dec 21, 2020 | 000-55940 |
| 4 | Open Document | Open Filing | FORM 4 | May 4, 2020 | Apr 30, 2020 | 000-55940 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 27, 2020 | Jan 23, 2020 | 000-55940 |
| 3/A | Open Document | Open Filing | FORM 3A | Sep 27, 2019 | Aug 21, 2019 | 000-55940 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 12, 2019 | Aug 21, 2019 | 000-55940 |