| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Mar 24, 2022 | Mar 22, 2022 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2021 | Mar 11, 2021 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 30, 2020 | Nov 24, 2020 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 18, 2020 | May 14, 2020 | 001-11848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 10, 2020 | Mar 6, 2020 | 001-11848 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 5, 2019 | Aug 1, 2019 | 001-11848 |