| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Apr 5, 2022 | Apr 1, 2022 | 001-13677 | |
| 4 | Open Document | Open Filing | Jun 2, 2021 | Jun 1, 2021 | 001-13677 | |
| 4 | Open Document | Open Filing | Jul 27, 2020 | Jul 24, 2020 | 001-13677 | |
| 4 | Open Document | Open Filing | Jul 25, 2019 | Jul 25, 2019 | 001-13677 | |
| 4 | Open Document | Open Filing | Jul 25, 2018 | Jul 25, 2018 | 001-13677 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 10, 2018 | Jan 8, 2018 | 001-13677 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 10, 2018 | Jan 8, 2018 | 001-13677 |