| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jul 16, 2021 | Jul 15, 2021 | 000-53500 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 31, 2020 | Dec 28, 2020 | 000-53500 |
| 3/A | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 24, 2016 | May 18, 2016 | 000-53500 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | May 20, 2016 | May 18, 2016 | 000-53500 |