| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 14, 2021 | Oct 7, 2021 | 000-13215 |
| 4 | Open Document | Open Filing | Jan 11, 2021 | Jan 5, 2021 | 000-13215 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 28, 2020 | Jan 17, 2020 | 000-13215 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 6, 2014 | Feb 28, 2014 | 000-13215 |