| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 - | Jun 1, 2021 | May 28, 2021 | 000-52598 |
| 4/A | Open Document | Open Filing | FORM 4/A - | Jan 6, 2021 | Jan 4, 2021 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 5, 2021 | Jan 4, 2021 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 3, 2020 | Jan 2, 2020 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 3, 2019 | Jan 2, 2019 | 000-52598 |
| 4/A | Open Document | Open Filing | FORM 4/A - | Jun 1, 2018 | Apr 30, 2007 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Feb 27, 2018 | Feb 26, 2018 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 3, 2018 | Jan 2, 2018 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Feb 1, 2017 | Feb 1, 2017 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 4, 2017 | Jan 3, 2017 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Jan 4, 2016 | Jan 4, 2016 | 000-52598 |
| 4 | Open Document | Open Filing | FORM 4 - | Mar 27, 2015 | Mar 25, 2015 | 000-52598 |