| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2022 | Feb 10, 2022 | 001-39231 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 29, 2021 | Mar 22, 2021 | 001-39231 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Mar 29, 2021 | Mar 22, 2021 | 001-39231 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 5, 2015 | Feb 23, 2015 | 000-55347 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 16, 2015 | Jan 6, 2015 | 000-55347 |