| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 05 Apr 2022 | 01 Apr 2022 | 001-13677 | |
| 4 | Open Document | Open Filing | 02 Jun 2021 | 01 Jun 2021 | 001-13677 | |
| 4 | Open Document | Open Filing | 27 Jul 2020 | 24 Jul 2020 | 001-13677 | |
| 4 | Open Document | Open Filing | 25 Jul 2019 | 25 Jul 2019 | 001-13677 | |
| 4 | Open Document | Open Filing | 25 Jul 2018 | 25 Jul 2018 | 001-13677 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Jan 2018 | 08 Jan 2018 | 001-13677 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Jan 2018 | 08 Jan 2018 | 001-13677 |