| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | May 27, 2022 | May 26, 2022 | 001-37661 | |
| 4 | Open Document | Open Filing | May 12, 2022 | May 11, 2022 | 001-37661 | |
| 4 | Open Document | Open Filing | Jan 31, 2022 | Jan 27, 2022 | 001-37661 | |
| 4 | Open Document | Open Filing | Jan 28, 2021 | Jan 28, 2021 | 001-37661 | |
| 4 | Open Document | Open Filing | FORM 4 | Mar 11, 2020 | Mar 10, 2020 | 001-37661 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 24, 2020 | Jan 23, 2020 | 001-37661 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2019 | May 9, 2019 | 001-37661 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2019 | Sep 11, 2015 | 001-37661 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 28, 2019 | Jan 24, 2019 | 001-37661 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 28, 2017 | Jul 28, 2017 | 001-37661 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 5, 2016 | Apr 4, 2016 | 001-37661 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 27, 2015 | Sep 11, 2015 | 000-30497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 16, 2015 | Sep 11, 2015 | 000-30497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 4, 2015 | Aug 28, 2015 | 000-30497 |