| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 ECHERD | Dec 1, 2021 | Nov 30, 2021 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 13, 2021 | Sep 10, 2021 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 ECHERD | Aug 11, 2021 | Aug 10, 2021 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 ECHERD | Jul 21, 2021 | Jul 19, 2021 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 ECHERD | Jun 17, 2021 | Jun 16, 2021 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 ECHERD | Jun 14, 2021 | Jun 11, 2021 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 ECHERD | Jun 11, 2021 | Jun 9, 2021 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 9, 2020 | Jun 8, 2020 | 001-35285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 14, 2019 | May 12, 2019 | 001-35285 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Jan 4, 2019 | Jan 1, 2019 | 001-35285 |