| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Jun 14, 2023 | Jun 7, 2023 | 000-56225 | |
| 4 | Open Document | Open Filing | Dec 21, 2022 | Dec 14, 2022 | 000-56225 | |
| 4 | Open Document | Open Filing | Mar 18, 2022 | Mar 15, 2022 | 000-56225 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 6, 2021 | Jan 4, 2021 | 000-56225 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 13, 2018 | Feb 12, 2018 | 001-07945 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 26, 2018 | Jan 25, 2018 | 001-07945 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 23, 2018 | Jan 19, 2018 | 001-07945 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 11, 2017 | Jul 7, 2017 | 001-07945 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2017 | Feb 23, 2017 | 001-07945 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 26, 2017 | Jan 24, 2017 | 001-07945 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2016 | Mar 1, 2016 | 001-07945 |