| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Mar 18, 2022 | Mar 17, 2022 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 1, 2021 | Feb 24, 2021 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 7, 2020 | Feb 5, 2020 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 6, 2019 | Feb 6, 2019 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 8, 2018 | Feb 7, 2018 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 9, 2017 | Feb 8, 2017 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 24, 2016 | Oct 21, 2016 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | May 2, 2016 | Apr 27, 2016 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 26, 2016 | Feb 25, 2016 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 26, 2016 | Feb 9, 2016 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 9, 2016 | Feb 5, 2016 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 1, 2016 | Jan 28, 2016 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 22, 2015 | Jan 20, 2015 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 14, 2014 | Aug 12, 2014 | 000-51821 |
| 4 | Open Document | Open Filing | FORM 4 | May 23, 2014 | May 21, 2014 | 000-51821 |