| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Mar 14, 2022 | Mar 10, 2022 | 000-09115 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 15, 2021 | Mar 11, 2021 | 000-09115 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 16, 2020 | Mar 12, 2020 | 000-09115 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 18, 2019 | Mar 14, 2019 | 000-09115 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 9, 2018 | Mar 8, 2018 | 000-09115 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 10, 2017 | Mar 9, 2017 | 000-09115 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 11, 2016 | Mar 10, 2016 | 000-09115 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 7, 2015 | Sep 28, 2015 | 000-09115 |