| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 22 May 2025 | 20 May 2025 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 29 May 2024 | 28 May 2024 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 24 May 2023 | 24 May 2023 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 01 Jul 2022 | 30 Jun 2022 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 01 Jun 2021 | 28 May 2021 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 12 Aug 2020 | 11 Aug 2020 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 27 Aug 2019 | 23 Aug 2019 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Aug 2019 | 05 Aug 2019 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 06 Aug 2018 | 02 Aug 2018 | 000-24939 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Mar 2018 | 13 Mar 2018 | 000-55885 |
| 4 | Open Document | Open Filing | FORM 4 | 16 Aug 2017 | 14 Aug 2017 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Aug 2016 | 01 Aug 2016 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 | 10 Aug 2015 | 06 Aug 2015 | 000-24939 |
| 4 | Open Document | Open Filing | FORM 4 - | 06 Aug 2014 | 05 Aug 2014 | 000-24939 |