| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 2, 2022 | Feb 1, 2022 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 3, 2021 | Feb 1, 2021 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 3, 2021 | Feb 1, 2021 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 20, 2020 | Mar 18, 2020 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 3, 2020 | Feb 3, 2020 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 1, 2019 | Feb 1, 2019 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 1, 2018 | Feb 1, 2018 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 1, 2017 | Feb 1, 2017 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 13, 2016 | Sep 9, 2016 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 8, 2016 | Sep 6, 2016 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 1, 2016 | Feb 1, 2016 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 14, 2015 | Dec 11, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 14, 2015 | Aug 13, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 18, 2015 | Jun 16, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 15, 2015 | Jun 11, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 5, 2015 | Jun 4, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 11, 2015 | Mar 10, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 4, 2015 | Mar 2, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 2, 2015 | Feb 2, 2015 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 4, 2014 | Aug 1, 2014 | 000-51759 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 3, 2014 | Jan 2, 2014 | 000-51759 |