| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | May 11, 2021 | May 3, 2021 | 001-38508 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 28, 2020 | Oct 26, 2020 | 001-38508 |
| 4 | Open Document | Open Filing | Mar 12, 2020 | Feb 4, 2020 | 001-38508 | |
| SC 13G | Open Document | Open Filing | SCHEDULE 13G | Feb 13, 2019 | ||
| 4 | Open Document | Open Filing | 4 | Jul 27, 2018 | Jun 4, 2018 | 001-38508 |
| 3 | Open Document | Open Filing | 3 | May 29, 2018 | May 29, 2018 | 001-38508 |