| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D | Open Document | Open Filing | 10 Jun 2021 | |||
| 4 | Open Document | Open Filing | 10 Jun 2021 | 08 Mar 2021 | 000-55413 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Apr 2016 | 09 Nov 2015 | 000-55413 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Apr 2015 | 01 Apr 2015 | 000-55413 |