| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Jul 23, 2021 | Jul 21, 2021 | 001-39768 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 7, 2020 | Dec 7, 2020 | 001-39768 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 5, 2019 | Feb 1, 2019 | 001-36803 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 5, 2018 | Feb 1, 2018 | 001-36803 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 9, 2017 | Mar 8, 2017 | 001-36803 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 3, 2017 | Feb 1, 2017 | 001-36803 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 3, 2016 | Feb 1, 2016 | 001-36803 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 26, 2015 | Mar 24, 2015 | 001-36803 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Mar 26, 2015 | Mar 24, 2015 | 001-36803 |