| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 20, 2021 | May 18, 2021 | 001-36856 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 18, 2021 | Feb 18, 2021 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Nov 30, 2020 | Nov 25, 2020 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Aug 21, 2020 | Aug 19, 2020 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Apr 7, 2020 | Apr 3, 2020 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Jul 25, 2019 | Jul 24, 2019 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Jul 3, 2018 | Jul 3, 2018 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Jan 5, 2018 | Jan 3, 2018 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Jul 21, 2017 | Jul 20, 2017 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Jul 7, 2017 | Jul 6, 2017 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Jun 22, 2017 | Jun 20, 2017 | 001-36856 |
| 4 | Open Document | Open Filing | 4 | Aug 29, 2016 | Aug 26, 2016 | 001-36856 |
| 3 | Open Document | Open Filing | 3 | Apr 20, 2016 | Apr 1, 2016 | 001-36856 |