| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jan 31, 2023 | Dec 31, 2022 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 1, 2022 | Sep 30, 2022 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 2, 2022 | Jun 30, 2022 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 1, 2022 | Jun 29, 2022 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | May 3, 2022 | Mar 31, 2022 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 25, 2022 | Mar 23, 2022 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 1, 2022 | Dec 31, 2021 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 2, 2021 | Sep 30, 2021 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 3, 2021 | Jul 30, 2021 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 13, 2021 | Jul 11, 2021 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | May 4, 2021 | Apr 30, 2021 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 26, 2021 | Mar 24, 2021 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 2, 2021 | Dec 31, 2020 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 3, 2020 | Oct 30, 2020 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 3, 2020 | Jul 31, 2020 | 000-15950 |
| 4 | Open Document | Open Filing | Jul 8, 2020 | Jul 7, 2020 | 000-15950 | |
| 4 | Open Document | Open Filing | FORM 4 | Jun 30, 2020 | Jun 29, 2020 | 000-15950 |
| 4 | Open Document | Open Filing | FORM 4 | May 4, 2020 | May 1, 2020 | 000-15950 |
| 3 | Open Document | Open Filing | FORM 3 | Apr 3, 2020 | Mar 31, 2020 | 000-15950 |