| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Dec 2021 | 16 Dec 2021 | 000-55428 |
| 4 | Open Document | Open Filing | FORM 4 | 16 Mar 2021 | 15 Mar 2021 | 000-55428 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Sep 2020 | 01 Sep 2020 | 000-55428 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Sep 2020 | 01 Sep 2020 | 000-55428 |