| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Mar 3, 2022 | Mar 1, 2022 | 001-15787 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 24, 2022 | Feb 22, 2022 | 001-15787 | 
| 4 | Open Document | Open Filing | FORM 4 | Mar 3, 2021 | Mar 1, 2021 | 001-15787 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 25, 2021 | Feb 23, 2021 | 001-15787 | 
| 4 | Open Document | Open Filing | FORM 4 | Mar 4, 2020 | Mar 2, 2020 | 001-15787 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 27, 2020 | Feb 25, 2020 | 001-15787 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 5, 2019 | Mar 1, 2019 | 001-15787 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 28, 2019 | Feb 26, 2019 | 001-15787 | 
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Sep 4, 2018 | Sep 1, 2018 | 001-15787 |