| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 6, 2022 | Jul 6, 2022 | 001-36486 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 16, 2021 | Nov 15, 2021 | 001-36486 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 16, 2020 | Nov 12, 2020 | 001-36486 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 22, 2019 | Nov 20, 2019 | 001-36486 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 21, 2018 | Nov 19, 2018 | 001-36486 |
| 4 | Open Document | Open Filing | Nov 15, 2018 | Nov 13, 2018 | 001-36486 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2017 | Nov 15, 2017 | 001-36486 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 17, 2016 | Nov 15, 2016 | 001-36486 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 8, 2016 | Sep 6, 2016 | 001-36486 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 8, 2016 | Sep 6, 2016 | 001-36486 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 2, 2015 | Apr 1, 2015 | 001-34746 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 6, 2015 | Jan 2, 2015 | 001-34746 |
| 4 | Open Document | Open Filing | Dec 16, 2014 | Dec 15, 2014 | 000-20900 | |
| 4 | Open Document | Open Filing | Jun 19, 2014 | Jun 18, 2014 | 000-20900 | |
| 4 | Open Document | Open Filing | Apr 1, 2014 | Apr 1, 2014 | 000-20900 | |
| 3 | Open Document | Open Filing | Apr 1, 2014 | Mar 28, 2014 | 000-20900 |