| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Apr 4, 2022 | Mar 31, 2022 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 21, 2022 | Mar 17, 2022 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 4, 2022 | Dec 31, 2021 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 20, 2021 | Jan 18, 2021 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 23, 2020 | Mar 20, 2020 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 3, 2020 | Jan 31, 2020 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 24, 2019 | Jan 22, 2019 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 17, 2018 | Jan 15, 2018 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 18, 2017 | Jan 16, 2017 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 26, 2016 | Jan 22, 2016 | 001-35750 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 6, 2015 | Jan 2, 2015 | 001-35750 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 24, 2014 | Sep 19, 2014 | 001-35750 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 31, 2014 | Jul 31, 2014 | 001-35750 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 30, 2014 | Jul 29, 2014 | 001-35750 |