| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Feb 14, 2024 | Feb 12, 2024 | 000-25923 |
| 4 | Open Document | Open Filing | FORM 4 | May 26, 2021 | May 24, 2021 | 000-25923 |
| 5 | Open Document | Open Filing | FORM 5 | Feb 12, 2021 | Dec 31, 2020 | 000-25923 |
| 4 | Open Document | Open Filing | Apr 6, 2020 | Apr 2, 2020 | 000-25923 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2020 | Feb 10, 2020 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 13, 2019 | Feb 11, 2019 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2018 | Feb 12, 2018 | 000-25923 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 9, 2018 | Oct 20, 2017 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 16, 2017 | Feb 14, 2017 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 5, 2016 | Dec 2, 2016 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 22, 2016 | Nov 21, 2016 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 15, 2016 | Nov 11, 2016 | 000-25923 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 22, 2016 | Mar 11, 2016 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2016 | Mar 10, 2016 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2016 | Feb 9, 2016 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 24, 2015 | Dec 1, 2014 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 4, 2015 | Dec 3, 2015 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 12, 2015 | Feb 10, 2015 | 000-25923 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 19, 2014 | Mar 13, 2014 | 000-25923 |