| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Aug 2021 | 26 Aug 2021 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Oct 2020 | 23 Oct 2020 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Dec 2019 | 18 Dec 2019 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Dec 2019 | 12 Dec 2019 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Nov 2019 | 26 Nov 2019 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Nov 2019 | 19 Nov 2019 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Oct 2019 | 20 Oct 2019 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Apr 2018 | 02 Apr 2018 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Dec 2017 | 08 Dec 2017 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Aug 2017 | 16 Aug 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 | 07 Dec 2015 | 03 Dec 2015 | 001-16525 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Nov 2015 | 18 Oct 2015 | 001-16525 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Oct 2014 | 20 Oct 2014 | 001-16525 |