| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 22 Mar 2023 | 20 Mar 2023 | 000-23970 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Nov 2022 | 10 Nov 2022 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Aug 2022 | 04 Aug 2022 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 May 2022 | 17 May 2022 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Nov 2021 | 16 Nov 2021 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 Jun 2019 | 31 May 2019 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 May 2019 | 17 May 2019 | 000-23970 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Sep 2017 | 14 Aug 2017 | 000-23970 |