| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 20, 2022 | Jan 20, 2022 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 7, 2021 | Jun 3, 2021 | 000-50448 |
| 4/A | Open Document | Open Filing | FORM 4/A SUBMISSION | Sep 17, 2020 | Sep 2, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 4, 2020 | Sep 2, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 24, 2020 | Aug 20, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 5, 2020 | Aug 4, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 15, 2020 | May 5, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 6, 2019 | Aug 2, 2019 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 25, 2019 | May 24, 2018 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 5, 2018 | Jun 4, 2018 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 22, 2017 | May 18, 2017 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 13, 2016 | Jun 9, 2016 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 31, 2015 | May 21, 2015 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 26, 2015 | May 21, 2015 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 7, 2015 | May 5, 2015 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 13, 2015 | Nov 28, 2011 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 17, 2014 | Jun 13, 2014 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 2, 2014 | Mar 31, 2014 | 000-50448 |