| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 23, 2022 | May 19, 2022 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 19, 2021 | May 17, 2021 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 17, 2020 | Sep 16, 2020 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 26, 2020 | May 22, 2020 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 17, 2019 | Sep 16, 2019 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 17, 2019 | May 15, 2019 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 5, 2019 | Mar 4, 2019 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 20, 2018 | Sep 18, 2018 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 19, 2017 | Sep 18, 2017 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 19, 2016 | Sep 16, 2016 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 25, 2016 | Feb 23, 2016 | 001-12251 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 15, 2015 | Sep 15, 2015 | 001-12251 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Sep 15, 2015 | Sep 15, 2015 | 001-12251 |