| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 07 Jul 2021 | 30 Jun 2021 | 000-55413 | |
| 4 | Open Document | Open Filing | 10 Jun 2021 | 18 May 2017 | 000-55413 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Jul 2015 | 20 Jul 2015 | 000-55413 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Apr 2015 | 01 Apr 2015 | 000-55413 |