| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 22, 2021 | Dec 22, 2021 | 001-11929 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Dec 22, 2021 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Nov 12, 2021 | ||
| 4 | Open Document | Open Filing | Dec 16, 2020 | Dec 10, 2020 | 001-04422 | |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Sep 23, 2020 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 28, 2019 | Mar 28, 2019 | 001-16791 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Mar 28, 2019 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 10, 2018 | Dec 10, 2018 | 001-04422 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Jul 24, 2018 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | May 29, 2018 | ||
| SC 13D/A | Open Document | Open Filing | SC 13D/A | May 29, 2018 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 8, 2017 | Sep 8, 2017 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 6, 2017 | Sep 1, 2017 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 29, 2017 | Aug 25, 2017 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 21, 2017 | Aug 17, 2017 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 11, 2017 | Aug 9, 2017 | 001-16791 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 7, 2017 | Aug 2, 2017 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 3, 2017 | Aug 2, 2017 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 28, 2017 | Jul 26, 2017 | 001-16791 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Sep 6, 2016 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 29, 2016 | Aug 25, 2016 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 23, 2016 | Aug 19, 2016 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2016 | Mar 16, 2016 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 16, 2016 | Feb 11, 2016 | 001-16791 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2016 | Feb 4, 2016 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2016 | Feb 1, 2016 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 10, 2015 | Sep 10, 2015 | 001-16791 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 31, 2015 | Aug 27, 2015 | 001-16791 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Aug 28, 2015 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 26, 2015 | Aug 24, 2015 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 12, 2015 | Aug 10, 2015 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 7, 2015 | Aug 5, 2015 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 4, 2015 | Jul 31, 2015 | 001-16791 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 1, 2015 | Mar 10, 2015 | 001-04422 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 17, 2015 | Feb 13, 2015 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 9, 2015 | Feb 5, 2015 | 001-16791 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2015 | Feb 2, 2015 | 001-16791 |