| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 09 Sep 2021 | 07 Sep 2021 | 001-08519 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Sep 2020 | 24 Sep 2020 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Aug 2019 | 26 Aug 2019 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Aug 2019 | 20 Aug 2019 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 May 2019 | 02 May 2019 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 May 2018 | 01 May 2018 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 May 2017 | 02 May 2017 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 May 2016 | 29 Apr 2016 | 001-08519 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Jul 2015 | 29 Jul 2015 | 001-08519 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jul 2015 | 02 Jul 2015 | 001-08519 |