| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Oct 2021 | 18 Oct 2021 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2021 | 18 May 2021 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Feb 2021 | 03 Feb 2021 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2020 | 11 Feb 2020 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2018 | 08 Mar 2018 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Mar 2017 | 06 Mar 2017 | 000-30777 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Mar 2017 | 01 Mar 2017 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Mar 2017 | 01 Mar 2017 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Mar 2017 | 27 Feb 2017 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 May 2016 | 11 May 2016 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2016 | 02 Mar 2016 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2016 | 09 Feb 2016 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2016 | 29 Jul 2015 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Apr 2012 | 19 Apr 2012 | 000-30777 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Mar 2012 | 26 Jan 2012 | 000-30777 |