| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 5, 2022 | Apr 1, 2022 | 001-41052 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 5, 2022 | Apr 1, 2022 | 001-41052 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 13, 2020 | Mar 13, 2020 | 000-51173 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 12, 2020 | Feb 10, 2020 | 000-51173 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 27, 2020 | Jan 23, 2020 | 000-51173 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 27, 2020 | Sep 16, 2019 | 000-51173 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Jan 27, 2020 | Aug 30, 2019 | 000-51173 |