| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 15 Oct 2021 | 15 Jun 2020 | 000-55591 | |
| 3 | Open Document | Open Filing | 15 Oct 2021 | 05 Feb 2020 | 000-55591 | |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Jan 2014 | 14 Jan 2014 | 000-55128 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 Apr 2013 | 28 Mar 2013 | 000-53972 |
| 4 | Open Document | Open Filing | FORM 4 | 14 Jun 2012 | 08 Jun 2012 | 000-53972 |
| 4 | Open Document | Open Filing | FORM 4 | 11 May 2012 | 09 May 2012 | 000-53972 |
| 4 | Open Document | Open Filing | FORM 4 | 09 Mar 2012 | 07 Mar 2012 | 000-53972 |