| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 May 2021 | 21 May 2021 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Apr 2018 | 02 Apr 2018 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Dec 2017 | 01 Dec 2017 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Jul 2016 | 19 Jul 2016 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Oct 2015 | 19 Oct 2015 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2014 | 04 Feb 2014 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Oct 2013 | 11 Oct 2013 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Aug 2012 | 09 Aug 2012 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jun 2012 | 22 Jun 2012 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Jun 2012 | 18 Jun 2012 | 001-16525 |