| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 4 | May 15, 2025 | May 14, 2025 | 000-51237 |
| 4 | Open Document | Open Filing | 4 | Aug 30, 2024 | Aug 29, 2024 | 000-51237 |
| 4 | Open Document | Open Filing | 4 | May 16, 2024 | May 14, 2024 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 15, 2023 | May 11, 2023 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 16, 2022 | May 12, 2022 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 17, 2021 | May 13, 2021 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 19, 2020 | May 15, 2020 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 17, 2019 | May 16, 2019 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 17, 2019 | May 16, 2019 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 13, 2019 | May 9, 2019 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2019 | Feb 21, 2019 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 6, 2018 | Aug 2, 2018 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 2, 2018 | Jul 31, 2018 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 14, 2018 | May 11, 2018 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 14, 2018 | May 10, 2018 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 4, 2017 | Aug 2, 2017 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 15, 2017 | May 11, 2017 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 1, 2016 | Jul 28, 2016 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 13, 2016 | May 12, 2016 | 000-51237 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 21, 2015 | Jul 31, 2015 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 4, 2015 | Jul 31, 2015 | 001-07635 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 2, 2015 | Jun 30, 2015 | 001-07635 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 15, 2015 | May 14, 2015 | 000-51237 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 9, 2015 | Mar 5, 2015 | 000-51237 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Mar 9, 2015 | Mar 5, 2015 | 000-51237 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 28, 2014 | Oct 24, 2014 | 001-07635 |