| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 28 May 2025 | 20 May 2025 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 | 24 May 2024 | 21 May 2024 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 | 18 May 2023 | 16 May 2023 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | 19 May 2022 | 17 May 2022 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | 20 May 2021 | 18 May 2021 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 12 Mar 2021 | 10 Mar 2021 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Dec 2020 | 09 Dec 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Oct 2020 | 07 Oct 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Aug 2020 | 07 Aug 2020 | 000-21835 |
| 4 | Open Document | Open Filing | FORM 4 - | 14 May 2020 | 12 May 2020 | 000-20797 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2020 | 06 Mar 2020 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Dec 2019 | 12 Dec 2019 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Sep 2019 | 20 Sep 2019 | 000-21835 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Jun 2019 | 14 Jun 2019 | 000-21835 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 May 2019 | 14 May 2019 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | 17 May 2018 | 15 May 2018 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | 23 May 2017 | 16 May 2017 | 000-20797 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Dec 2016 | 05 Dec 2016 | 000-21835 |
| 4 | Open Document | Open Filing | FORM 4 - | 19 May 2016 | 17 May 2016 | 000-20797 |
| 4 | Open Document | Open Filing | FORM 4 - | 21 May 2015 | 19 May 2015 | 000-20797 |
| 3 | Open Document | Open Filing | FORM 3 - | 09 Jan 2015 | 01 Jan 2015 | 000-20797 |