| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Apr 29, 2022 | Apr 29, 2022 | 000-56428 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 28, 2021 | Jul 26, 2021 | 001-34948 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 16, 2020 | Mar 12, 2020 | 001-34948 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 2, 2020 | Feb 27, 2020 | 001-34948 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 12, 2018 | Dec 10, 2018 | 001-34948 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 11, 2018 | Dec 10, 2018 | 001-34948 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 21, 2018 | Nov 19, 2018 | 001-34948 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 5, 2018 | Aug 28, 2018 | 001-34948 |