| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 11, 2022 | Dec 31, 2021 | 000-50275 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 26, 2021 | Nov 26, 2021 | 000-50275 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 9, 2021 | Dec 31, 2020 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 11, 2020 | Feb 7, 2020 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 19, 2019 | Mar 19, 2019 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 19, 2018 | Sep 19, 2018 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 18, 2018 | Jun 15, 2018 | 000-50275 |
| 5 | Open Document | Open Filing | FORM 5 | Feb 7, 2018 | Dec 31, 2017 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 9, 2017 | Nov 8, 2017 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 20, 2017 | Sep 19, 2017 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 14, 2017 | Sep 12, 2017 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 30, 2015 | Dec 29, 2015 | 000-50275 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 13, 2015 | Nov 4, 2015 | 000-50275 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 6, 2015 | Nov 4, 2015 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 24, 2014 | Nov 21, 2014 | 000-50275 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 22, 2014 | Oct 20, 2014 | 000-50275 |
| 3 | Open Document | Open Filing | FORM 3 | Mar 19, 2014 | Mar 17, 2014 | 000-50275 |