| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Mar 16, 2022 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 15, 2022 | Mar 15, 2022 | 001-40364 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 24, 2021 | May 17, 2021 | 001-40364 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 24, 2021 | May 20, 2021 | 001-40364 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 19, 2021 | May 17, 2021 | 001-40364 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 14, 2021 | May 12, 2021 | 001-40364 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 11, 2021 | May 7, 2021 | 001-40364 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 29, 2021 | Apr 27, 2021 | 001-40364 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 26, 2021 | Apr 22, 2021 | 001-40364 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 21, 2021 | Apr 19, 2021 | 000-24575 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 16, 2021 | Apr 14, 2021 | 000-24575 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 12, 2021 | Apr 8, 2021 | 000-24575 |
| SC 13D/A | Open Document | Open Filing | SCHEDULE 13D/A | Apr 1, 2021 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 17, 2021 | Mar 17, 2021 | 000-24575 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 15, 2021 | Mar 12, 2021 | 000-24575 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Feb 14, 2020 | ||
| 4 | Open Document | Open Filing | 4 | Nov 19, 2019 | Nov 18, 2019 | 000-24575 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Nov 4, 2019 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 6, 2019 | ||
| 4 | Open Document | Open Filing | 4 | Jul 30, 2019 | Jul 26, 2019 | 000-24575 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | May 13, 2019 | ||
| 4 | Open Document | Open Filing | 4 | May 3, 2019 | Apr 22, 2019 | 000-24575 |
| 4 | Open Document | Open Filing | 4 | Feb 14, 2019 | Jan 4, 2019 | 000-24575 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Dec 28, 2018 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Dec 18, 2018 | ||
| 4 | Open Document | Open Filing | 4 | Nov 27, 2018 | Nov 8, 2018 | 000-24575 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Nov 8, 2018 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 21, 2018 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 7, 2018 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Jul 27, 2018 | ||
| 4 | Open Document | Open Filing | 4 | Jul 13, 2018 | Mar 31, 2017 | 000-24575 |
| 4/A | Open Document | Open Filing | 4/A | Jul 13, 2018 | May 2, 2012 | 000-24575 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 4, 2017 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Jun 12, 2017 |