| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 9, 2022 | Mar 5, 2020 | 000-55613 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 12, 2019 | Jun 30, 2019 | 000-55613 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 9, 2019 | Mar 31, 2019 | 000-55613 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 9, 2019 | Dec 31, 2018 | 000-55613 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2018 | Dec 4, 2018 | 000-55613 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2018 | Sep 30, 2018 | 000-55613 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2018 | Feb 22, 2018 | 000-55613 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2018 | Jun 22, 2016 | 000-55613 |