| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 17 May 2022 | 16 May 2022 | 000-55598 |
| 4 | Open Document | Open Filing | FORM 4 | 17 May 2021 | 11 May 2021 | 000-55598 |
| 4 | Open Document | Open Filing | FORM 4 | 14 May 2020 | 12 May 2020 | 000-55598 |
| 4 | Open Document | Open Filing | FORM 4 | 16 May 2019 | 15 May 2019 | 000-55598 |
| 4 | Open Document | Open Filing | FORM 4 | 02 Apr 2019 | 29 Mar 2019 | 000-55598 |
| 3 | Open Document | Open Filing | FORM 3 | 18 Mar 2016 | 18 Mar 2016 | 000-55598 |