| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Sep 2021 | 10 Sep 2021 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Sep 2020 | 10 Sep 2020 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Sep 2019 | 10 Sep 2019 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2019 | 21 May 2019 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2019 | 17 May 2019 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Sep 2018 | 10 Sep 2018 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Feb 2018 | 26 Feb 2018 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Sep 2017 | 16 Aug 2017 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jun 2017 | 12 Jun 2017 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Aug 2016 | 24 Aug 2016 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Aug 2015 | 19 Aug 2015 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Aug 2014 | 20 Aug 2014 | 000-27512 |