| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Mar 29, 2024 | Mar 25, 2024 | 001-12555 | |
| 4 | Open Document | Open Filing | Jun 1, 2021 | May 26, 2021 | 001-12555 | |
| 4 | Open Document | Open Filing | May 5, 2021 | May 3, 2021 | 001-12555 | |
| 4 | Open Document | Open Filing | Feb 26, 2020 | Feb 21, 2020 | 000-51353 | |
| 5 | Open Document | Open Filing | Feb 24, 2020 | Dec 31, 2019 | 000-51353 | |
| 4 | Open Document | Open Filing | FORM 4 | Oct 18, 2017 | Oct 16, 2017 | 000-51353 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 10, 2016 | Aug 8, 2016 | 000-51353 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 21, 2016 | Jun 17, 2016 | 000-51353 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Feb 17, 2016 | Feb 12, 2016 | 000-51353 |