| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Jul 2021 | 16 Jul 2021 | 001-08568 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Jul 2021 | 16 Jul 2021 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 15 Mar 2021 | 11 Mar 2021 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 17 Jul 2020 | 16 Jul 2020 | 001-08568 |
| 3 | Open Document | Open Filing | FORM 3 | 17 Jul 2020 | 16 Jul 2020 | 001-08568 |