| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 22 Jul 2021 | 22 Jul 2021 | 000-04957 | |
| 4 | Open Document | Open Filing | 14 Jan 2019 | 09 Jan 2019 | 000-04957 | |
| 4 | Open Document | Open Filing | 02 Jan 2019 | 27 Dec 2018 | 000-04957 | |
| 4 | Open Document | Open Filing | 20 Dec 2018 | 17 Dec 2018 | 000-04957 | |
| 4 | Open Document | Open Filing | 20 Dec 2018 | 14 Dec 2018 | 000-04957 | |
| 4 | Open Document | Open Filing | 09 Oct 2018 | 02 Oct 2018 | 000-04957 | |
| 4 | Open Document | Open Filing | 06 Sep 2018 | 31 Aug 2018 | 000-04957 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Jun 2018 | 25 Jun 2018 | 000-04957 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 Jun 2018 | 31 May 2018 | 000-04957 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Jan 2018 | 03 Jan 2018 | 000-04957 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Jan 2018 | 03 Jan 2018 | 000-04957 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Dec 2017 | 30 Nov 2017 | 000-04957 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Dec 2017 | 30 Nov 2017 | 000-04957 |