| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 3 | Open Document | Open Filing | Aug 13, 2021 | Feb 12, 2021 | 811-22963 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 8, 2020 | Dec 4, 2020 | 001-39754 |
| 3 | Open Document | Open Filing | Dec 1, 2020 | Dec 1, 2020 | 001-39754 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 1, 2019 | Jul 30, 2019 | 001-38186 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 15, 2017 | Aug 15, 2017 | 001-38186 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 6, 2017 | Jun 29, 2017 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2017 | Feb 7, 2017 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 28, 2016 | Nov 23, 2016 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 23, 2016 | Nov 22, 2016 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2016 | Nov 7, 2016 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 16, 2016 | Aug 15, 2016 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 11, 2015 | Dec 7, 2015 | 000-26841 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 13, 2015 | Oct 13, 2015 | 001-37588 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 20, 2015 | Mar 19, 2015 | 001-35898 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 10, 2014 | Dec 8, 2014 | 000-26841 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 10, 2014 | Dec 8, 2014 | 000-26841 |