| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2021 | Sep 1, 2021 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 31, 2021 | Aug 27, 2021 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 18, 2020 | Feb 14, 2020 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 6, 2020 | Feb 5, 2020 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 3, 2018 | Nov 30, 2018 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 30, 2018 | Aug 29, 2018 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 24, 2018 | Aug 22, 2018 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 16, 2017 | Nov 16, 2017 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2015 | May 20, 2015 | 000-12196 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 22, 2014 | 000-12196 |