| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Dec 18, 2023 | Dec 14, 2023 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 13, 2023 | Nov 8, 2023 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 7, 2023 | Nov 3, 2023 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 8, 2023 | Feb 6, 2023 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 16, 2022 | Nov 8, 2022 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 9, 2022 | Nov 7, 2022 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 7, 2022 | Nov 3, 2022 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | May 5, 2022 | May 3, 2022 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 8, 2022 | Feb 4, 2022 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 10, 2021 | Nov 9, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 9, 2021 | Feb 4, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 5, 2021 | Nov 3, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 14, 2021 | Sep 10, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | May 5, 2021 | May 3, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 5, 2021 | Feb 5, 2021 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 9, 2020 | Nov 5, 2020 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 15, 2020 | Sep 11, 2020 | 000-26841 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 28, 2020 | Feb 4, 2020 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 19, 2019 | Mar 18, 2019 | 000-26841 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 19, 2019 | Mar 18, 2019 | 000-26841 |