| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 8, 2022 | Aug 5, 2022 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 22, 2022 | Apr 18, 2022 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 23, 2021 | Apr 22, 2021 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 21, 2020 | Apr 18, 2020 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 22, 2019 | Apr 18, 2019 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 19, 2018 | Apr 18, 2018 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 19, 2017 | Jul 17, 2017 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 19, 2017 | Apr 18, 2017 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2016 | Jun 30, 2016 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 20, 2016 | Apr 18, 2016 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 21, 2015 | Apr 18, 2015 | 000-03498 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 21, 2014 | Apr 18, 2014 | 000-03498 |