| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 26, 2021 | Aug 25, 2021 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 8, 2021 | Mar 31, 2021 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 26, 2020 | Aug 25, 2020 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 27, 2019 | Dec 2, 2019 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 16, 2019 | Aug 14, 2019 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 27, 2018 | Aug 23, 2018 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 20, 2018 | Aug 20, 2018 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2018 | May 9, 2018 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 29, 2017 | Aug 25, 2017 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 21, 2017 | Aug 17, 2017 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 29, 2016 | Aug 25, 2016 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 10, 2015 | Nov 9, 2015 | 000-09068 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 27, 2015 | Aug 25, 2015 | 000-09068 |
| 4 | Open Document | Open Filing | Mar 11, 2015 | Mar 10, 2015 | 000-09068 | |
| 4 | Open Document | Open Filing | Nov 20, 2014 | Nov 19, 2014 | 000-09068 | |
| 4 | Open Document | Open Filing | Aug 27, 2014 | Aug 26, 2014 | 000-09068 |