| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4/A | Open Document | Open Filing | FORM 4/A | Apr 6, 2022 | Jul 2, 2020 | 001-08789 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 5, 2022 | Apr 1, 2022 | 001-08789 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 7, 2020 | Jul 2, 2020 | 001-08789 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 6, 2017 | Jan 4, 2017 | 001-08789 |