| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 16, 2021 | Jul 15, 2021 | 001-05807 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 17, 2020 | Jul 16, 2020 | 001-05807 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 22, 2019 | Jul 18, 2019 | 001-05807 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 19, 2018 | Jul 18, 2018 | 001-05807 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 25, 2017 | Apr 21, 2017 | 001-05807 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 28, 2016 | Apr 22, 2016 | 001-05807 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 21, 2015 | Apr 17, 2015 | 001-05807 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 22, 2014 | Apr 17, 2014 | 001-05807 |