| 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 | Mar 31, 2021 | Mar 29, 2021 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 17, 2021 | Feb 14, 2021 | 000-50448 |
| 4/A | Open Document | Open Filing | FORM 4/A SUBMISSION | Sep 17, 2020 | Aug 28, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 1, 2020 | Aug 28, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 31, 2020 | Mar 29, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 19, 2020 | Feb 14, 2020 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 2, 2019 | Mar 29, 2019 | 000-50448 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Feb 21, 2019 | Feb 1, 2019 | 000-50448 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Oct 4, 2018 | Oct 4, 2018 | 001-07797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 24, 2018 | May 22, 2018 | 001-07797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 27, 2018 | Feb 25, 2018 | 001-07797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 23, 2017 | May 22, 2017 | 001-07797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 27, 2017 | Feb 25, 2017 | 001-07797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 24, 2016 | May 22, 2016 | 001-07797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 29, 2016 | Feb 25, 2016 | 001-07797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 27, 2015 | Feb 25, 2015 | 001-07797 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Apr 10, 2014 | Apr 4, 2014 | 001-07797 |