| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2022 | Jan 14, 2022 | 000-52534 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2022 | Dec 31, 2021 | 000-52534 |
| 5/A | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2022 | Dec 31, 2012 | 000-52534 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 4, 2022 | Aug 31, 2021 | 333-139045 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 15, 2019 | Dec 31, 2018 | 000-52534 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 6, 2016 | Dec 31, 2014 | 333-139045 |
| 5/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 7, 2014 | Dec 31, 2012 | 000-52534 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 7, 2014 | Jan 7, 2014 | 000-52534 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 7, 2014 | Dec 31, 2012 | 000-52534 |