| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 08 Jun 2021 | 04 Jun 2021 | 000-21835 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 12 Mar 2021 | 10 Mar 2021 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Dec 2020 | 09 Dec 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Oct 2020 | 07 Oct 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Aug 2020 | 07 Aug 2020 | 000-21835 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Apr 2020 | 20 Apr 2020 | 000-21835 |