| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Dec 1, 2021 | Nov 30, 2021 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 7, 2021 | Apr 5, 2021 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Nov 17, 2020 | Nov 14, 2020 | 001-07982 | 
| 4/A | Open Document | Open Filing | FORM 4/A | May 22, 2020 | Apr 5, 2020 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 7, 2020 | Apr 5, 2020 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Jan 16, 2020 | Jan 15, 2020 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Nov 14, 2019 | Nov 14, 2019 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 9, 2019 | Apr 5, 2019 | 001-07982 | 
| 3 | Open Document | Open Filing | FORM 3 | Jan 30, 2019 | Jan 27, 2019 | 001-07982 |