| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 11, 2025 | Jun 10, 2025 | 000-27512 |
| 4 | Open Document | Open Filing | Jun 3, 2025 | Jun 1, 2025 | 001-15891 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 11, 2024 | Jun 10, 2024 | 000-27512 |
| 4 | Open Document | Open Filing | Jun 4, 2024 | Jun 1, 2024 | 001-15891 | |
| 4 | Open Document | Open Filing | Dec 19, 2023 | Dec 15, 2023 | 001-15891 | |
| 3 | Open Document | Open Filing | Dec 19, 2023 | Nov 30, 2023 | 001-15891 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 12, 2023 | Jun 10, 2023 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 14, 2022 | Jun 10, 2022 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 14, 2021 | Sep 10, 2021 | 000-27512 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 1, 2021 | Mar 31, 2021 | 001-33843 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 28, 2020 | Oct 27, 2020 | 001-33843 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 14, 2020 | Sep 10, 2020 | 000-27512 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 9, 2020 | Sep 8, 2020 | 001-33843 |
| 4 | Open Document | Open Filing | FORM 4 | May 1, 2020 | Apr 29, 2020 | 001-33843 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 11, 2020 | Mar 11, 2020 | 001-33843 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 2, 2020 | Feb 27, 2020 | 001-33843 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 12, 2019 | Sep 10, 2019 | 001-33843 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 12, 2019 | Sep 10, 2019 | 000-27512 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 20, 2019 | May 16, 2019 | 001-33843 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 11, 2018 | Sep 10, 2018 | 000-27512 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 21, 2018 | May 17, 2018 | 001-33843 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 19, 2017 | Aug 16, 2017 | 000-27512 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 15, 2017 | Aug 24, 2017 | 000-27512 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2017 | Aug 24, 2017 | 000-27512 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 22, 2017 | May 18, 2017 | 001-33843 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 26, 2016 | Aug 24, 2016 | 000-27512 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 26, 2016 | May 20, 2016 | 001-33843 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 9, 2016 | Mar 1, 2016 | 000-27512 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 22, 2015 | Apr 20, 2015 | 001-33843 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 5, 2015 | Mar 3, 2015 | 001-33843 |
| 4 | Open Document | Open Filing | DIRECTOR STOCK OPTION (RIGHT TO PURCHASE) | May 27, 2014 | May 22, 2014 | 001-33843 |