| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jul 6, 2022 | Jul 1, 2022 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 27, 2020 | Aug 25, 2020 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2020 | Apr 30, 2020 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 28, 2020 | Apr 24, 2020 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 25, 2020 | Mar 24, 2020 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 12, 2020 | Mar 10, 2020 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 16, 2018 | Feb 12, 2018 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 25, 2017 | Sep 21, 2017 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2017 | Mar 1, 2017 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 23, 2016 | Jun 23, 2016 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 11, 2015 | Sep 9, 2015 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 21, 2015 | May 20, 2015 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 20, 2015 | Feb 18, 2015 | 000-55084 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 8, 2014 | Jan 6, 2014 | 000-55084 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 8, 2014 | Oct 9, 2013 | 000-55084 |