| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13D/A | Report | SC 13D/A | May 24, 2019 | |
| SC 13D/A | Report | May 24, 2019 | ||
| SC 13D/A | Report | SC 13D/A (AMEND. NO. 20) | Sep 19, 2018 | |
| SC 13D/A | Report | SC 13D (AMENDMENT NO. 19) | Jan 2, 2018 | |
| SC 13D | Report | SCHEDULE 13D | Jan 2, 2018 | |
| SC 13D/A | Report | SC 13D AMENDMENT NO. 18 | Feb 16, 2017 | |
| SC 13D/A | Report | SC 13D/A | Dec 22, 2016 | |
| SC 13D/A | Report | AMENDMENT NO.16 TO SC 13D | Dec 12, 2016 | |
| SC 13D/A | Report | SC 13D/A | Oct 31, 2016 | |
| SC 13D/A | Report | SC 13D/A | Jun 22, 2016 | |
| SC 13D/A | Report | Data | SC 13D/A | Apr 20, 2016 | |
| SC 13D/A | Report | SC 13D/A | Feb 8, 2016 | |
| SC 13D/A | Report | AMENDMENT NO. 11 | Sep 15, 2015 | |
| SC 13D/A | Report | SC 13D/A | Nov 21, 2014 | |
| SC 13D/A | Report | SC 13D/A | May 28, 2014 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 10 | Jul 31, 2013 | |
| SC 13D/A | Report | SCHEDULE 13D/A | Jan 10, 2013 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 8 | Oct 31, 2012 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 7 | Feb 15, 2012 | |
| SC 13D/A | Report | FORM SC 13D/A | Nov 15, 2011 | |
| SC 13D/A | Report | AMENDMENT TO FORM SC 13D | Nov 7, 2011 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 6 | Oct 31, 2011 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT | Sep 21, 2011 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 5 | Sep 19, 2011 | |
| SC 13D/A | Report | SCHEDULE 13D/A | Aug 18, 2011 | |
| SC 13D/A | Report | AMENDMENT NO. 4 TO SCHEDULE 13D | Aug 17, 2011 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 3 | Aug 4, 2011 | |
| SC 13D/A | Report | Aug 3, 2011 | ||
| SC 13D/A | Report | Jun 23, 2011 | ||
| SC 13D/A | Report | AMENDMENT #2 TO SCHEDULE 13D | Jun 14, 2011 | |
| SC 13D/A | Report | SCHEDULE 13D AMENDMENT NO. 1 | Apr 18, 2011 | |
| SC 13D/A | Report | Jun 3, 2010 | ||
| SC 13D | Report | SCHEDULE 13D | Jun 1, 2010 |