| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Feb 28, 2022 | Feb 28, 2022 | 000-56264 | |
| 4 | Open Document | Open Filing | Apr 23, 2019 | Apr 11, 2019 | 333-170132 | |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2018 | Dec 31, 2017 | 333-170132 |