| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Oct 4, 2021 | Sep 30, 2021 | 000-54697 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 8, 2021 | Apr 7, 2021 | 000-54697 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 16, 2019 | Sep 13, 2019 | 000-54697 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 27, 2017 | Mar 21, 2017 | 000-54697 |