| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 31, 2022 | May 31, 2022 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 9, 2022 | May 9, 2022 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 19, 2022 | Apr 15, 2022 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 5, 2022 | Apr 1, 2022 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 16, 2022 | Feb 15, 2022 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 29, 2021 | Jun 25, 2021 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 3, 2021 | Jun 1, 2021 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 11, 2021 | May 7, 2021 | 000-23071 |
| 4 | Open Document | Open Filing | FORM 4 | May 5, 2021 | May 4, 2021 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 7, 2021 | Apr 5, 2021 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 1, 2020 | Aug 31, 2020 | 000-23071 |
| 4 | Open Document | Open Filing | FORM 4 | May 29, 2020 | May 29, 2020 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 11, 2020 | May 8, 2020 | 000-23071 |
| 4 | Open Document | Open Filing | FORM 4 | May 6, 2020 | May 4, 2020 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 6, 2020 | Apr 2, 2020 | 000-23071 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 20, 2020 | Mar 19, 2020 | 000-23071 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 9, 2019 | May 8, 2019 | 000-23071 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 9, 2019 | May 8, 2018 | 000-23071 |