| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 30, 2021 | Aug 26, 2021 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 27, 2021 | Aug 25, 2021 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 24, 2021 | Aug 22, 2021 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 31, 2020 | Aug 28, 2020 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 28, 2020 | Aug 23, 2020 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 26, 2020 | Aug 25, 2020 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2020 | Aug 22, 2020 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2019 | Nov 4, 2019 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 30, 2019 | Aug 28, 2019 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 29, 2019 | Aug 27, 2019 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 28, 2019 | Aug 26, 2019 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 26, 2019 | Aug 22, 2019 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2018 | Nov 7, 2018 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 28, 2018 | Aug 27, 2018 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 27, 2018 | Aug 24, 2018 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 24, 2018 | Aug 22, 2018 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 24, 2018 | Aug 23, 2018 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 23, 2018 | Aug 21, 2018 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 23, 2018 | May 22, 2018 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 28, 2017 | Aug 25, 2017 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 24, 2017 | Aug 22, 2017 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 22, 2017 | Aug 20, 2017 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 31, 2016 | Aug 29, 2016 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 29, 2016 | Aug 25, 2016 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 22, 2016 | Aug 18, 2016 | 001-13988 |
| 3/A | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Jun 24, 2013 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2015 | Nov 4, 2015 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 31, 2015 | Aug 29, 2015 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 28, 2015 | Aug 26, 2015 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2015 | Aug 24, 2015 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 24, 2015 | Aug 20, 2015 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 2, 2015 | Mar 1, 2015 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2014 | Aug 29, 2014 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 26, 2014 | Aug 24, 2014 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 25, 2014 | Aug 21, 2014 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 21, 2014 | Aug 20, 2014 | 001-13988 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2014 | Mar 1, 2014 | 001-13988 |