| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 8, 2022 | Aug 5, 2022 | 000-54863 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 28, 2022 | Apr 27, 2022 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 25, 2021 | Feb 23, 2021 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 7, 2020 | Dec 4, 2020 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 4, 2020 | Mar 3, 2020 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 26, 2020 | Feb 25, 2020 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 3, 2019 | Aug 29, 2019 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 28, 2019 | Feb 26, 2019 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 7, 2018 | Sep 6, 2018 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 15, 2018 | Mar 13, 2018 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 1, 2018 | Feb 27, 2018 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 12, 2017 | Sep 11, 2017 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 3, 2017 | Mar 2, 2017 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 23, 2017 | Feb 21, 2017 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 28, 2016 | Nov 23, 2016 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 25, 2016 | Feb 23, 2016 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 16, 2015 | Dec 14, 2015 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 2, 2015 | Jan 28, 2015 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 16, 2014 | Dec 15, 2014 | 000-54863 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 24, 2014 | Jan 22, 2014 | 000-54863 |