| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Nov 2021 | 05 Aug 2021 | 001-39227 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Oct 2020 | 07 Oct 2020 | 001-39227 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Aug 2020 | 20 Aug 2020 | 001-39227 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Jul 2020 | 01 Apr 2020 | 001-39227 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Apr 2019 | 08 Mar 2018 | 000-55497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 May 2018 | 08 Mar 2018 | 000-55497 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 16 Apr 2018 | 03 Apr 2018 | 000-55497 |