| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 13, 2021 | May 11, 2021 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 14, 2020 | May 12, 2020 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 16, 2019 | May 14, 2019 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 10, 2018 | May 8, 2018 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 11, 2017 | May 9, 2017 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 12, 2016 | May 10, 2016 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 13, 2015 | May 12, 2015 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 11, 2015 | May 11, 2015 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 7, 2014 | May 6, 2014 | 001-35229 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 7, 2014 | May 5, 2014 | 001-35229 |