| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Jan 10, 2022 | ||
| 4 | Open Document | Open Filing | FORM 4 | Jan 10, 2022 | Dec 31, 2021 | 000-54126 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Sep 9, 2021 | ||
| 4 | Open Document | Open Filing | FORM 4 | Sep 9, 2021 | Sep 8, 2021 | 000-54126 |
| SC 13D/A | Open Document | Open Filing | Apr 26, 2017 | |||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 26, 2017 | Apr 25, 2017 | 000-54126 |
| SC 13D | Open Document | Open Filing | May 27, 2015 | |||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 27, 2015 | Jun 14, 2014 | 000-54126 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | May 27, 2015 | Dec 28, 2011 | 000-54126 |