| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 29 Aug 2022 | 26 Aug 2022 | 001-16537 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 18 May 2022 | 16 May 2022 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2021 | 18 May 2021 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2020 | 15 May 2020 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2019 | 21 May 2019 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 May 2019 | 06 May 2019 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 May 2018 | 14 May 2018 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2018 | 08 May 2018 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 May 2017 | 25 May 2017 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2017 | 15 May 2017 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Feb 2017 | 01 Feb 2017 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2016 | 17 May 2016 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2016 | 10 May 2016 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2015 | 11 May 2015 | 001-16537 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2014 | 22 May 2014 | 001-16537 |