| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2021 | Aug 12, 2021 | 000-18492 |
| 4 | Open Document | Open Filing | FORM 4 | May 28, 2020 | May 27, 2020 | 000-18492 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 18, 2019 | Mar 15, 2019 | 000-18492 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 13, 2018 | Sep 12, 2018 | 000-18492 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 15, 2017 | Sep 13, 2017 | 000-18492 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 3, 2017 | Dec 29, 2016 | 000-18492 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 30, 2015 | Dec 28, 2015 | 000-18492 |