| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 04 Mar 2022 | 02 Mar 2022 | 000-21121 |
| 4 | Open Document | Open Filing | FORM 4 | 08 Mar 2021 | 04 Mar 2021 | 000-21121 |
| 4 | Open Document | Open Filing | FORM 4 | 04 May 2020 | 30 Apr 2020 | 000-21121 |
| 4 | Open Document | Open Filing | FORM 4 | 02 Mar 2020 | 27 Feb 2020 | 000-21121 |
| 4 | Open Document | Open Filing | FORM 4 | 01 Mar 2019 | 27 Feb 2019 | 000-21121 |
| 4 | Open Document | Open Filing | FORM 4 | 13 Nov 2018 | 09 Nov 2018 | 000-21121 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2018 | 01 Mar 2018 | 000-21121 |