| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Mar 1, 2024 | Feb 28, 2024 | 000-24960 | |
| 4 | Open Document | Open Filing | Feb 23, 2024 | Feb 21, 2024 | 000-24960 | |
| 4 | Open Document | Open Filing | Jan 3, 2024 | Dec 31, 2023 | 000-24960 | |
| 4 | Open Document | Open Filing | May 19, 2023 | May 17, 2023 | 000-24960 | |
| 4 | Open Document | Open Filing | FORM 4 | Mar 2, 2023 | Feb 28, 2023 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 4, 2023 | Dec 31, 2022 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 1, 2022 | Jul 28, 2022 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 2, 2022 | May 31, 2022 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 22, 2022 | Feb 17, 2022 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 4, 2022 | Dec 31, 2021 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 7, 2021 | Sep 2, 2021 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 9, 2021 | Mar 5, 2021 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 19, 2021 | Feb 17, 2021 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 5, 2021 | Dec 31, 2020 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 13, 2020 | Nov 11, 2020 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 4, 2020 | Nov 2, 2020 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 20, 2020 | Feb 18, 2020 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 3, 2020 | Dec 31, 2019 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 10, 2019 | Jul 8, 2019 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 15, 2019 | Mar 13, 2019 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 3, 2019 | Dec 31, 2018 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | May 17, 2018 | May 15, 2018 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 5, 2018 | Mar 1, 2018 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 3, 2018 | Dec 31, 2017 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 7, 2017 | Nov 3, 2017 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 18, 2017 | Jul 14, 2017 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 16, 2017 | Mar 14, 2017 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 4, 2017 | Dec 31, 2016 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | May 20, 2016 | May 18, 2016 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 29, 2016 | Feb 25, 2016 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 26, 2015 | Aug 24, 2015 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 24, 2015 | Jun 22, 2015 | 000-24960 |
| 4/A | Open Document | Open Filing | FORM 4/A | Mar 17, 2015 | Mar 3, 2015 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 5, 2015 | Mar 3, 2015 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 26, 2015 | Feb 25, 2015 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 9, 2014 | Sep 4, 2014 | 000-24960 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 23, 2014 | Jun 19, 2014 | 000-24960 |
| 3 | Open Document | Open Filing | FORM 3 | Mar 21, 2014 | Mar 14, 2014 | 000-24960 |