| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Dec 13, 2024 | Dec 11, 2024 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 18, 2023 | Dec 14, 2023 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 12, 2022 | Dec 8, 2022 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 9, 2021 | Dec 7, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | May 20, 2021 | May 18, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 3, 2021 | Mar 1, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 11, 2020 | Dec 9, 2020 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 13, 2019 | Dec 11, 2019 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 11, 2019 | Dec 9, 2019 | 000-26841 |
| 5 | Open Document | Open Filing | FORM 5 SUBMISSION | Feb 1, 2019 | Dec 31, 2018 | 001-35039 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 12, 2018 | Dec 11, 2018 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 23, 2018 | May 23, 2018 | 001-35039 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 14, 2018 | Mar 13, 2018 | 001-35039 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 19, 2017 | Dec 11, 2017 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 18, 2017 | May 16, 2017 | 001-35039 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 15, 2016 | Dec 13, 2016 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 12, 2016 | Dec 12, 2016 | 001-35039 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 8, 2016 | Dec 8, 2016 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 8, 2016 | Nov 8, 2016 | 001-35039 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 20, 2016 | May 18, 2016 | 001-35039 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 10, 2016 | Feb 9, 2016 | 001-35039 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 15, 2015 | Dec 11, 2015 | 001-34434 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 11, 2015 | Dec 7, 2015 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 18, 2015 | Nov 17, 2015 | 001-35039 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Oct 9, 2015 | Sep 30, 2015 | 001-34434 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 11, 2015 | Jun 10, 2015 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 14, 2015 | May 13, 2015 | 001-35039 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 10, 2014 | Dec 8, 2014 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 10, 2014 | Apr 8, 2014 | 001-35039 |
| 5 | Open Document | Open Filing | FORM 5 SUBMISSION | Feb 5, 2014 | Dec 31, 2013 | 001-35039 |