| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | 20 Oct 2021 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Oct 2021 | 01 Jul 2021 | 000-55809 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Apr 2020 | 30 Mar 2020 | 000-55809 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Mar 2020 | 31 Dec 2019 | 000-55809 |
| SC 13D | Open Document | Open Filing | 08 Mar 2019 | |||
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Mar 2019 | 31 Dec 2018 | 000-55809 |