| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | May 1, 2023 | Apr 27, 2023 | 000-20388 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 12, 2022 | May 10, 2022 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 | May 2, 2022 | Apr 28, 2022 | 000-20388 |
| 5 | Open Document | Open Filing | FORM 5 | Jan 14, 2022 | Jan 1, 2022 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | May 10, 2021 | May 7, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 6, 2021 | May 4, 2021 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 26, 2021 | Apr 22, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 9, 2021 | Feb 8, 2021 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 12, 2020 | Nov 10, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 12, 2020 | Aug 12, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 7, 2020 | May 5, 2020 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 27, 2020 | Apr 23, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 6, 2020 | Feb 5, 2020 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 2, 2019 | Apr 30, 2019 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 30, 2019 | Apr 26, 2019 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 13, 2019 | Feb 12, 2019 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 | May 1, 2018 | Apr 27, 2018 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 19, 2018 | Apr 17, 2018 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 22, 2018 | Feb 20, 2018 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 | May 1, 2017 | Apr 28, 2017 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 20, 2017 | Apr 19, 2017 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 7, 2016 | Dec 5, 2016 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 28, 2016 | Apr 26, 2016 | 001-33458 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 26, 2016 | Apr 22, 2016 | 000-20388 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 30, 2015 | Apr 28, 2015 | 001-33458 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 28, 2015 | Apr 24, 2015 | 000-20388 |
| 4 | Open Document | Open Filing | Apr 30, 2014 | Apr 29, 2014 | 001-33458 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 29, 2014 | Apr 25, 2014 | 000-20388 |