| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Dec 21, 2023 | Dec 21, 2023 | 001-40597 | |
| SC 13D/A | Open Document | Open Filing | Aug 5, 2020 | |||
| 4 | Open Document | Open Filing | Aug 5, 2020 | Jul 31, 2020 | 000-54954 | |
| 4 | Open Document | Open Filing | Apr 2, 2018 | Jan 31, 2018 | 000-54954 | |
| SC 13D/A | Open Document | Open Filing | Apr 2, 2018 | |||
| SC 13D/A | Open Document | Open Filing | Nov 13, 2017 | |||
| 4 | Open Document | Open Filing | Nov 9, 2017 | Oct 31, 2017 | 000-54954 | |
| SC 13D/A | Open Document | Open Filing | Aug 31, 2017 | |||
| 4 | Open Document | Open Filing | Aug 31, 2017 | Jul 27, 2017 | 000-54954 | |
| SC 13D/A | Open Document | Open Filing | Jun 6, 2017 | |||
| 4 | Open Document | Open Filing | Jun 6, 2017 | Apr 30, 2017 | 000-54954 | |
| 4 | Open Document | Open Filing | Feb 7, 2017 | Jan 31, 2017 | 000-54954 | |
| SC 13D/A | Open Document | Open Filing | Feb 7, 2017 | |||
| 4 | Open Document | Open Filing | Feb 6, 2017 | Oct 31, 2016 | 000-54954 | |
| SC 13D/A | Open Document | Open Filing | Nov 30, 2016 | |||
| 4 | Open Document | Open Filing | Sep 28, 2016 | Jul 31, 2016 | 000-54954 | |
| SC 13D/A | Open Document | Open Filing | Sep 28, 2016 | |||
| 4 | Open Document | Open Filing | May 17, 2016 | Apr 30, 2016 | 000-54954 | |
| SC 13D/A | Open Document | Open Filing | May 17, 2016 | |||
| SC 13D/A | Open Document | Open Filing | May 4, 2016 | |||
| 4 | Open Document | Open Filing | May 4, 2016 | Jan 31, 2016 | 000-54954 | |
| 4 | Open Document | Open Filing | Nov 12, 2015 | Nov 10, 2015 | 000-54954 | |
| 4 | Open Document | Open Filing | Aug 13, 2015 | Aug 10, 2015 | 000-54954 | |
| 4 | Open Document | Open Filing | Jun 16, 2015 | Jun 12, 2015 | 000-54954 | |
| 4 | Open Document | Open Filing | May 27, 2015 | May 22, 2015 | 000-54954 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 16, 2014 | Apr 16, 2014 | 000-54954 |