| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 21, 2021 | Jun 16, 2021 | 811-22485 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 21, 2019 | Nov 19, 2019 | 811-22485 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 15, 2019 | Nov 13, 2019 | 811-22485 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2018 | Oct 2, 2018 | 811-22485 |
| 3 | Open Document | Open Filing | 3 | Sep 21, 2015 | Sep 21, 2015 | 001-37561 |