| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | May 7, 2021 | May 5, 2021 | 001-36523 | |
| 4 | Open Document | Open Filing | May 8, 2020 | May 6, 2020 | 001-36523 | |
| 4 | Open Document | Open Filing | May 13, 2019 | May 9, 2019 | 001-36523 | |
| 4 | Open Document | Open Filing | Jun 5, 2018 | Jun 1, 2018 | 001-36523 | |
| 4 | Open Document | Open Filing | May 12, 2017 | May 10, 2017 | 001-36523 | |
| 4 | Open Document | Open Filing | May 17, 2016 | May 13, 2016 | 001-36523 | |
| 4 | Open Document | Open Filing | Feb 23, 2016 | Feb 19, 2016 | 001-36523 | |
| 4 | Open Document | Open Filing | 4 | Mar 16, 2015 | Mar 12, 2015 | 001-36523 |
| 3 | Open Document | Open Filing | FORM 3 | Jan 26, 2015 | Jan 14, 2015 | 001-36523 |