| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2025 | Mar 7, 2025 | 000-20322 |
| 4 | Open Document | Open Filing | Mar 4, 2020 | Mar 2, 2020 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 20, 2020 | Feb 18, 2020 | 001-13881 | |
| 4 | Open Document | Open Filing | Nov 19, 2019 | Nov 15, 2019 | 001-13881 | |
| 4 | Open Document | Open Filing | Mar 7, 2019 | Mar 5, 2019 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 21, 2019 | Feb 15, 2019 | 001-13881 | |
| 4/A | Open Document | Open Filing | Dec 6, 2018 | Nov 15, 2018 | 001-13881 | |
| 4 | Open Document | Open Filing | Nov 16, 2018 | Nov 15, 2018 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 22, 2018 | Feb 20, 2018 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 20, 2018 | Feb 15, 2018 | 001-13881 | |
| 4 | Open Document | Open Filing | Nov 16, 2017 | Nov 15, 2017 | 001-13881 | |
| 4 | Open Document | Open Filing | Jun 19, 2017 | Jun 15, 2017 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 23, 2017 | Feb 21, 2017 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 17, 2017 | Feb 15, 2017 | 001-13881 | |
| 4 | Open Document | Open Filing | Nov 30, 2016 | Nov 11, 2016 | 001-13881 | |
| 4 | Open Document | Open Filing | Jun 16, 2016 | Jun 15, 2016 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 25, 2016 | Feb 22, 2016 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 18, 2016 | Feb 16, 2016 | 001-13881 | |
| 4 | Open Document | Open Filing | Jun 16, 2015 | Jun 15, 2015 | 001-13881 | |
| 4 | Open Document | Open Filing | Feb 25, 2015 | Feb 23, 2015 | 001-13881 | |
| 3 | Open Document | Open Filing | Jun 11, 2014 | Jun 2, 2014 | 001-13881 |