| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 05 May 2022 | 03 May 2022 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 06 May 2021 | 04 May 2021 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 01 May 2020 | 29 Apr 2020 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 May 2019 | 01 May 2019 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 May 2018 | 02 May 2018 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 May 2017 | 02 May 2017 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 May 2016 | 04 May 2016 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Dec 2015 | 21 Dec 2015 | 000-26640 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Nov 2015 | 28 Oct 2015 | 000-26640 |