| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Nov 2, 2021 | Oct 29, 2021 | 000-55008 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | Aug 20, 2021 | ||
| 4 | Open Document | Open Filing | Jun 21, 2021 | Jun 17, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Jun 16, 2021 | Jun 14, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Jun 11, 2021 | Jun 9, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Jun 8, 2021 | Jun 4, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Jun 3, 2021 | Jun 1, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | May 28, 2021 | May 26, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | May 25, 2021 | May 21, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | May 20, 2021 | May 13, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | May 17, 2021 | May 13, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | May 12, 2021 | May 10, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | May 7, 2021 | May 5, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | May 5, 2021 | May 4, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Apr 30, 2021 | Apr 30, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Apr 14, 2021 | Apr 6, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Feb 22, 2021 | Jan 27, 2021 | 000-55008 | |
| 4 | Open Document | Open Filing | Dec 30, 2020 | Dec 21, 2020 | 000-55008 | |
| 4 | Open Document | Open Filing | Dec 9, 2020 | Aug 25, 2020 | 000-55008 | |
| 4 | Open Document | Open Filing | Sep 30, 2020 | Sep 23, 2020 | 000-55008 | |
| 4 | Open Document | Open Filing | Sep 18, 2020 | Aug 27, 2020 | 000-55008 | |
| 4 | Open Document | Open Filing | Aug 6, 2020 | May 1, 2020 | 000-55008 | |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Aug 16, 2018 | ||
| 4 | Open Document | Open Filing | Aug 8, 2018 | Apr 23, 2018 | 000-55008 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 13, 2017 | Mar 8, 2017 | 000-55008 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 17, 2016 | Nov 4, 2016 | 000-55008 |