| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 5, 2021 | Nov 1, 2021 | 001-39146 | 
| 4 | Open Document | Open Filing | May 20, 2021 | May 18, 2021 | 001-39146 | |
| 4 | Open Document | Open Filing | Apr 26, 2021 | Apr 14, 2021 | 001-39146 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 24, 2020 | Nov 20, 2020 | 001-39146 | 
| 3 | Open Document | Open Filing | Nov 27, 2019 | Nov 21, 2019 | 333-207889 |