| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | May 14, 2021 | May 14, 2021 | 001-35335 | |
| SC 13D/A | Open Document | Open Filing | FORM SC 13D/A | May 14, 2021 | ||
| SC 13D/A | Open Document | Open Filing | FORM SC 13D/A | May 6, 2021 | ||
| 4 | Open Document | Open Filing | Jan 4, 2021 | Dec 30, 2020 | 001-35335 | |
| 4 | Open Document | Open Filing | FORM 4 | Jun 17, 2019 | Jun 13, 2019 | 001-35335 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 18, 2018 | Jun 14, 2018 | 001-35335 |
| SC 13D/A | Open Document | Open Filing | FORM SC 13D/A | Feb 14, 2018 | ||
| 4 | Open Document | Open Filing | FORM 4 | Jun 15, 2017 | Jun 13, 2017 | 001-35335 |
| SC 13D/A | Open Document | Open Filing | FORM SC 13D/A | Aug 15, 2016 | ||
| 4 | Open Document | Open Filing | FORM 4 | Jun 10, 2016 | Jun 8, 2016 | 001-35335 |
| 3 | Open Document | Open Filing | FORM 3 | Apr 14, 2016 | Apr 4, 2016 | 001-35335 |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | Apr 14, 2016 |