| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Nov 2022 | 08 Nov 2022 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Aug 2022 | 08 Aug 2022 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 May 2022 | 10 May 2022 | 000-31641 |
| 4 | Open Document | Open Filing | FORM 4 | 09 Feb 2022 | 08 Feb 2022 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Nov 2021 | 09 Nov 2021 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Aug 2021 | 09 Aug 2021 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 May 2021 | 07 May 2021 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Feb 2021 | 09 Feb 2021 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Nov 2020 | 09 Nov 2020 | 000-31641 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Aug 2020 | 07 Aug 2020 | 000-31641 |
| 4 | Open Document | Open Filing | FORM 4 | 07 May 2020 | 07 May 2020 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Feb 2020 | 07 Feb 2020 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 Nov 2019 | 07 Nov 2019 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 Aug 2019 | 06 Aug 2019 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 May 2019 | 07 May 2019 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Feb 2019 | 07 Feb 2019 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Nov 2018 | 07 Nov 2018 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 Aug 2018 | 07 Aug 2018 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 May 2018 | 08 May 2018 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Feb 2018 | 07 Feb 2018 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Nov 2017 | 07 Nov 2017 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Aug 2017 | 07 Aug 2017 | 000-31641 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 May 2017 | 09 May 2017 | 000-31641 |