| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Dec 2, 2021 | Dec 1, 2021 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 2, 2020 | Dec 1, 2020 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 3, 2019 | Dec 1, 2019 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | May 30, 2019 | May 28, 2019 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 4, 2018 | Dec 1, 2018 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 5, 2017 | Dec 1, 2017 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 13, 2017 | Mar 10, 2017 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 5, 2016 | Dec 1, 2016 | 001-37399 |
| 3 | Open Document | Open Filing | FORM 3 | May 18, 2015 | May 18, 2015 | 001-37399 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 2, 2015 | Apr 1, 2015 | 000-51093 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 11, 2014 | Apr 1, 2012 | 000-51093 |
| 4/A | Open Document | Open Filing | FORM 4/A | Jul 11, 2014 | Apr 1, 2013 | 000-51093 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 2, 2014 | Apr 1, 2014 | 000-51093 |