| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 20 May 2022 | ||
| 4 | Open Document | Open Filing | 20 May 2022 | 10 May 2022 | 000-30695 | |
| 4 | Open Document | Open Filing | 09 Dec 2021 | 29 Oct 2021 | 000-30695 | |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 10 Nov 2021 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 06 Aug 2021 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Jul 2021 | 23 Jul 2021 | 000-30695 |
| SC 13D | Open Document | Open Filing | SC 13D | 11 Dec 2020 | ||
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Dec 2020 | 19 Nov 2020 | 000-30695 |