| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Jul 2021 | 30 Jun 2021 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Sep 2020 | 18 Sep 2020 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 Jul 2020 | 03 Jul 2020 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Apr 2020 | 21 Apr 2020 | 000-55394 |
| 4 | Open Document | Open Filing | FORM 4 | 14 Feb 2020 | 14 Feb 2020 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Jul 2019 | 03 Jul 2019 | 000-55394 |
| 4 | Open Document | Open Filing | FORM 4 | 14 Feb 2019 | 14 Feb 2019 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Nov 2018 | 07 Nov 2018 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 Jul 2018 | 03 Jul 2018 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Feb 2018 | 14 Feb 2018 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Sep 2017 | 25 Jul 2017 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Jul 2017 | 03 Jul 2017 | 000-55394 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Apr 2017 | 07 Apr 2017 | 000-55394 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 Mar 2015 | 04 Mar 2015 | 000-55394 |