| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 22 Jul 2022 | ||
| 4 | Open Document | Open Filing | FORM 4 | 21 Jul 2022 | 15 Jul 2022 | 000-55965 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Jun 2019 | 30 May 2019 | 000-55965 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 21 May 2019 | ||
| 4 | Open Document | Open Filing | FORM 4 | 21 May 2019 | 17 May 2019 | 000-55965 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 24 Jul 2018 | ||
| 4 | Open Document | Open Filing | FORM 4 | 11 Jul 2018 | 28 Feb 2017 | 333-196663 |
| 4 | Open Document | Open Filing | FORM 4 | 09 May 2017 | 20 Apr 2017 | 333-196663 |
| SC 13D | Open Document | Open Filing | SC 13D | 14 Oct 2016 | ||
| 3 | Open Document | Open Filing | FORM 3 | 14 Oct 2016 | 03 Oct 2016 | 333-196663 |