| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Dec 2021 | 15 Dec 2021 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Dec 2020 | 23 Dec 2020 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Dec 2020 | 16 Dec 2020 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Sep 2020 | 10 Sep 2020 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Sep 2020 | 08 Sep 2020 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Dec 2019 | 18 Dec 2019 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Sep 2019 | 30 Aug 2019 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Dec 2018 | 06 Dec 2018 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Sep 2018 | 07 Sep 2018 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jan 2018 | 04 Jan 2018 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Dec 2017 | 28 Dec 2017 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Dec 2017 | 08 Dec 2017 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Dec 2017 | 05 Dec 2017 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Dec 2016 | 09 Dec 2016 | 001-08649 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Dec 2016 | 05 Dec 2016 | 001-08649 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Oct 2016 | 12 Oct 2016 | 001-08649 |