| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | May 26, 2023 | May 24, 2023 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | May 17, 2023 | May 15, 2023 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 3, 2022 | Jun 1, 2022 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | May 26, 2022 | May 24, 2022 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | May 26, 2021 | May 24, 2021 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | May 27, 2020 | May 20, 2020 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 25, 2019 | Jun 21, 2019 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 8, 2019 | Feb 6, 2019 | 000-08822 |
| 3 | Open Document | Open Filing | FORM 3 | Feb 8, 2019 | Feb 6, 2019 | 000-08822 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 12, 2017 | Sep 8, 2017 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | May 31, 2017 | May 26, 2017 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | May 26, 2017 | May 24, 2017 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 10, 2016 | Nov 9, 2016 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | May 26, 2016 | May 24, 2016 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 12, 2015 | Nov 9, 2015 | 001-35007 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Jun 24, 2015 | Jun 22, 2015 | 001-35007 |