| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 20 Aug 2021 | 17 Aug 2021 | 000-54878 | |
| 4 | Open Document | Open Filing | 17 May 2019 | 14 May 2019 | 000-54878 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Sep 2016 | 04 Feb 2015 | 000-54878 |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jan 2015 | 04 Sep 2012 | 000-54878 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Aug 2012 | 23 Aug 2012 | 333-175092 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jul 2012 | 16 Dec 2011 | 333-175092 |