| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jun 9, 2021 | Jun 9, 2021 | 001-39009 |
| 4/A | Open Document | Open Filing | FORM 4/A | Jun 9, 2021 | Feb 24, 2021 | 001-39009 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 26, 2021 | Feb 24, 2021 | 001-39009 |
| 4 | Open Document | Open Filing | FORM 4 | May 8, 2020 | May 6, 2020 | 001-39009 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 4, 2020 | Mar 2, 2020 | 001-39009 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2019 | Aug 14, 2019 | 001-39009 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 24, 2019 | Jun 21, 2019 | 000-08185 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 18, 2019 | Mar 15, 2019 | 000-08185 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 26, 2018 | Dec 21, 2018 | 000-08185 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 25, 2018 | Sep 21, 2018 | 000-08185 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 18, 2018 | Jun 15, 2018 | 000-08185 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 4, 2018 | May 31, 2018 | 000-08185 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 19, 2018 | Mar 16, 2018 | 000-08185 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 19, 2017 | Dec 15, 2017 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 19, 2017 | Sep 15, 2017 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 20, 2017 | Jun 16, 2017 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 9, 2017 | May 5, 2017 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 27, 2016 | Sep 26, 2016 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 20, 2016 | Sep 16, 2016 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 21, 2016 | Jun 17, 2016 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 21, 2016 | Apr 20, 2016 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 22, 2016 | Mar 18, 2016 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 22, 2015 | Dec 18, 2015 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 22, 2015 | Sep 18, 2015 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 23, 2015 | Jun 19, 2015 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 4, 2015 | Apr 30, 2015 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 24, 2015 | Mar 20, 2015 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 23, 2014 | Dec 19, 2014 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 23, 2014 | Sep 19, 2014 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 24, 2014 | Jun 20, 2014 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 25, 2014 | Apr 23, 2014 | 000-08185 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 25, 2014 | Mar 21, 2014 | 000-08185 |