| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Apr 2022 | 15 Apr 2022 | 001-41040 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Mar 2022 | 01 Mar 2022 | 001-41040 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Apr 2021 | 15 Apr 2021 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Mar 2021 | 23 Mar 2021 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Mar 2021 | 17 Mar 2021 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Apr 2020 | 15 Apr 2020 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Jul 2019 | 15 Jul 2019 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Apr 2019 | 15 Apr 2019 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Mar 2019 | 15 Mar 2019 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Nov 2018 | 24 Nov 2018 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Apr 2018 | 15 Apr 2018 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Mar 2018 | 15 Mar 2018 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Nov 2017 | 24 Nov 2017 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Jul 2017 | 15 Jul 2017 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Apr 2017 | 15 Apr 2017 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Mar 2017 | 15 Mar 2017 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Nov 2016 | 24 Nov 2016 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Jul 2016 | 15 Jul 2016 | 000-19848 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Jun 2016 | 31 May 2016 | 000-19848 |