| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | May 27, 2022 | May 10, 2022 | 001-35850 | |
| 4 | Open Document | Open Filing | May 25, 2021 | May 23, 2021 | 001-35850 | |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 7, 2020 | Jul 1, 2020 | 001-35850 |
| 4 | Open Document | Open Filing | Mar 10, 2020 | Mar 9, 2020 | 001-35850 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 13, 2018 | Aug 13, 2018 | 001-35850 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 8, 2018 | Jun 6, 2018 | 001-35850 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 12, 2014 | Nov 11, 2014 | 001-35850 |