| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jun 22, 2022 | Jun 21, 2022 | 000-12668 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 22, 2020 | Jan 22, 2020 | 000-12668 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 21, 2020 | Jan 21, 2020 | 000-12668 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 13, 2019 | Sep 13, 2019 | 000-12668 |
| 4 | Open Document | Open Filing | FORM 4 | May 15, 2019 | May 14, 2019 | 000-12668 |
| 3 | Open Document | Open Filing | FORM 3 | Apr 22, 2019 | Apr 22, 2019 | 000-12668 |