| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Jul 2025 | 17 Jul 2025 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Jun 2025 | 07 Jun 2025 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Apr 2025 | 24 Apr 2025 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Jun 2024 | 07 Jun 2024 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2024 | 12 May 2024 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Jun 2023 | 14 Jun 2023 | 001-38856 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2023 | 12 May 2023 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Jun 2022 | 15 Jun 2022 | 001-38856 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2022 | 13 May 2022 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Jul 2021 | 09 Jul 2021 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Jul 2021 | 17 Jun 2021 | 001-38856 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jun 2021 | 14 May 2021 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Dec 2020 | 27 Nov 2020 | 001-38856 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Dec 2020 | 27 Nov 2020 | 001-38856 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Aug 2020 | 11 Aug 2020 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2020 | 15 May 2020 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2019 | 21 May 2019 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2019 | 17 May 2019 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Aug 2018 | 22 Aug 2018 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2018 | 18 May 2018 | 000-20853 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Dec 2017 | 18 Dec 2017 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Dec 2017 | 18 Dec 2017 | 000-20853 |