| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 10 Jan 2022 | 06 Jan 2022 | 000-31671 | |
| 4 | Open Document | Open Filing | 18 Feb 2021 | 16 Feb 2021 | 000-31671 | |
| 4 | Open Document | Open Filing | 06 Jan 2020 | 02 Jan 2020 | 000-31671 | |
| 4 | Open Document | Open Filing | 09 Jan 2019 | 07 Jan 2019 | 000-31671 | |
| 4 | Open Document | Open Filing | 10 Jan 2018 | 22 Mar 2017 | 000-31671 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Jan 2017 | 05 Jan 2017 | 000-31671 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Mar 2016 | 02 Jan 2016 | 000-31671 |
| 3 | Open Document | Open Filing | FORM 3 | 11 May 2015 | 30 Apr 2015 | 000-31671 |