| 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 | Feb 11, 2021 | Feb 9, 2021 | 001-32590 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2020 | Feb 28, 2020 | 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 8, 2019 | Aug 6, 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 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 24, 2017 | Jan 20, 2017 | 001-32590 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 6, 2016 | May 4, 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 | Jan 21, 2015 | Jan 16, 2015 | 001-32590 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 22, 2014 | Jan 17, 2014 | 001-32590 |