| 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 6, 2021 | Apr 5, 2021 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 25, 2021 | Feb 23, 2021 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Sep 1, 2020 | Aug 28, 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 | Apr 9, 2019 | Apr 5, 2019 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Jun 7, 2018 | Jun 6, 2018 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 9, 2018 | Apr 5, 2018 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Mar 20, 2018 | Mar 19, 2018 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Dec 5, 2017 | Dec 1, 2017 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 6, 2017 | Apr 5, 2017 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 7, 2016 | Apr 5, 2016 | 001-07982 | 
| 4 | Open Document | Open Filing | FORM 4 | Mar 19, 2015 | Mar 17, 2015 | 001-07982 | 
| 3 | Open Document | Open Filing | FORM 3 | Dec 1, 2014 | Dec 1, 2014 | 001-07982 |