| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Feb 24, 2025 | Feb 21, 2025 | 000-27251 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 TO SCHEDULE 13D | Sep 11, 2024 | ||
| 4 | Open Document | Open Filing | Sep 11, 2024 | Nov 11, 2020 | 000-27251 | |
| 4 | Open Document | Open Filing | May 19, 2021 | May 17, 2021 | 000-27251 | |
| 4 | Open Document | Open Filing | FORM 4 | Nov 13, 2020 | Nov 11, 2020 | 000-27251 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 29, 2020 | Oct 21, 2020 | 000-27251 |
| SC 13D/A | Open Document | Open Filing | SCHEDULE 13D/A | Oct 29, 2020 | ||
| SC 13D | Open Document | Open Filing | SC 13D | Mar 13, 2020 | ||
| 3 | Open Document | Open Filing | Mar 11, 2020 | Mar 9, 2020 | 000-27251 | |
| SC 13D | Open Document | Open Filing | SC 13D | Nov 7, 2019 | ||
| 4 | Open Document | Open Filing | FORM 4 | Nov 1, 2019 | Mar 1, 2019 | 000-55446 |
| 3 | Open Document | Open Filing | FORM 3 | Apr 1, 2019 | Mar 22, 2019 | 000-55446 |
| SC 13D | Open Document | Open Filing | SC 13D | Apr 1, 2019 |