| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 7, 2021 | Dec 3, 2021 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2021 | Feb 19, 2021 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 22, 2020 | Jan 17, 2020 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 1, 2019 | Jul 30, 2019 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 23, 2019 | Jan 18, 2019 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 23, 2018 | Jan 19, 2018 | 001-32590 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 5, 2017 | Nov 30, 2017 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 4, 2017 | Nov 30, 2017 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 24, 2017 | Jan 20, 2017 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 28, 2016 | Nov 23, 2016 | 001-32590 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 26, 2016 | Jan 22, 2016 | 001-32590 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 28, 2015 | May 26, 2015 | 001-32590 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 21, 2015 | Jan 16, 2015 | 001-32590 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 22, 2014 | Jan 17, 2014 | 001-32590 |