| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 13, 2023 | Jun 9, 2023 | 000-51315 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 14, 2022 | Jun 10, 2022 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 17, 2021 | Jun 16, 2021 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 1, 2020 | Jun 30, 2020 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 6, 2019 | Jun 5, 2019 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 7, 2018 | Jun 6, 2018 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2017 | Mar 14, 2017 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 16, 2016 | Mar 15, 2016 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 23, 2015 | Mar 19, 2015 | 000-51315 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 21, 2014 | Mar 20, 2014 | 000-51315 |