| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Jun 9, 2025 | Jun 5, 2025 | 000-15006 | |
| 4 | Open Document | Open Filing | Jun 17, 2024 | Jun 13, 2024 | 000-15006 | |
| 4 | Open Document | Open Filing | Jun 20, 2023 | Jun 15, 2023 | 000-15006 | |
| 4 | Open Document | Open Filing | Jun 17, 2022 | Jun 16, 2022 | 000-15006 | |
| 4 | Open Document | Open Filing | FORM 4 - | Jun 21, 2021 | Jun 17, 2021 | 000-15006 | 
| 4 | Open Document | Open Filing | FORM 4 - | Jun 19, 2020 | Jun 18, 2020 | 000-15006 | 
| 4 | Open Document | Open Filing | FORM 4 - | Jun 20, 2019 | Jun 19, 2019 | 000-15006 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 15, 2019 | Feb 13, 2019 | 001-36304 | 
| 4 | Open Document | Open Filing | Sep 28, 2018 | Sep 27, 2018 | 001-14778 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 3, 2018 | Aug 1, 2018 | 001-36304 | 
| 4 | Open Document | Open Filing | FORM 4 - | Jun 15, 2018 | Jun 13, 2018 | 000-15006 | 
| 4 | Open Document | Open Filing | FORM 4 - | Jun 16, 2017 | Jun 15, 2017 | 000-15006 | 
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 16, 2017 | Jun 15, 2017 | 000-15006 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 12, 2017 | Jun 8, 2017 | 001-14778 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 3, 2017 | Feb 1, 2017 | 001-36304 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 20, 2016 | Jun 16, 2016 | 000-16929 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 12, 2016 | Feb 10, 2016 | 001-36304 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 19, 2015 | Jun 18, 2015 | 000-16929 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 2, 2015 | Jun 1, 2015 | 001-36304 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 9, 2015 | Apr 9, 2015 | 000-16929 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 20, 2014 | Jun 19, 2014 | 000-16929 | 
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 11, 2014 | May 22, 2014 | 001-35817 | 
| 4 | Open Document | Open Filing | FORM 4 | Jun 4, 2014 | Jun 2, 2014 | 001-36304 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 27, 2014 | May 22, 2014 | 001-35817 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 16, 2014 | May 14, 2014 | 000-16929 |