| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jul 2, 2021 | Jul 1, 2021 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 1, 2021 | Apr 1, 2021 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 8, 2021 | Jan 7, 2021 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 5, 2020 | Oct 1, 2020 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 8, 2020 | Jul 2, 2020 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 10, 2020 | Mar 5, 2020 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 13, 2020 | Jan 9, 2020 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 11, 2019 | Oct 11, 2019 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | May 29, 2019 | May 24, 2019 | 000-17196 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 10, 2019 | Apr 8, 2019 | 000-17196 |
| 3 | Open Document | Open Filing | FORM 3 | Feb 8, 2019 | Feb 8, 2019 | 000-17196 |