| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 3 TO SCHEDULE 13D | Dec 21, 2021 | ||
| 4 | Open Document | Open Filing | Dec 20, 2021 | Dec 20, 2021 | 001-15687 | |
| D/A | Open Document | Open Filing | Oct 18, 2021 | 021-374989 | ||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 TO SCHEDULE 13D | Jul 13, 2021 | ||
| 4 | Open Document | Open Filing | Jul 13, 2021 | Jul 13, 2021 | 001-15687 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 TO SCHEDULE 13D | Mar 17, 2021 | ||
| 4 | Open Document | Open Filing | Mar 17, 2021 | Mar 15, 2021 | 001-15687 | |
| 3/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 30, 2020 | Nov 17, 2020 | 001-15687 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 27, 2020 | Nov 17, 2020 | 001-15687 |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Nov 27, 2020 | ||
| D | Open Document | Open Filing | Sep 8, 2020 | 021-374989 |