| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | AMENDED BENIFICAL OWNERSHIP REPORT | Jul 5, 2022 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 29, 2022 | Jun 23, 2022 | 000-56006 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2021 | May 19, 2021 | 000-56006 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 25, 2020 | Nov 23, 2020 | 000-56006 |
| SC 13D | Open Document | Open Filing | BENEFICIAL OWNERSHIP REPORT | Dec 20, 2019 | ||
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 20, 2018 | Jun 22, 2018 | 333-51918 |