| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 11, 2023 | May 10, 2023 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 17, 2022 | May 16, 2022 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2021 | May 3, 2021 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 8, 2020 | May 6, 2020 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 7, 2018 | Dec 5, 2018 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 16, 2018 | May 14, 2018 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 15, 2018 | May 11, 2018 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2017 | Feb 1, 2017 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 4, 2016 | Feb 3, 2016 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2015 | Feb 19, 2015 | 001-36769 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2015 | Feb 1, 2015 | 001-36769 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 6, 2015 | Feb 4, 2015 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 6, 2015 | Feb 4, 2015 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2015 | Feb 1, 2015 | 001-36769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 13, 2014 | Aug 13, 2014 | 000-17554 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | May 16, 2014 | May 12, 2014 | 000-17554 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2014 | May 12, 2014 | 000-17554 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2014 | Feb 13, 2014 | 000-17554 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 6, 2014 | Feb 5, 2014 | 000-17554 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 13, 2014 | Jan 10, 2014 | 000-17554 |