| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Sep 2021 | 23 Jul 2020 | 000-25753 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Oct 2020 | 30 Jun 2020 | 000-25753 |
| 4 | Open Document | Open Filing | 24 Mar 2020 | 17 Mar 2020 | 000-25753 | |
| 4 | Open Document | Open Filing | 09 Mar 2020 | 05 Mar 2020 | 000-25753 | |
| 4 | Open Document | Open Filing | 25 Nov 2019 | 21 Aug 2019 | 000-25753 | |
| 4 | Open Document | Open Filing | 26 Mar 2019 | 30 Sep 2018 | 000-25753 | |
| 4 | Open Document | Open Filing | 31 Aug 2018 | 03 May 2018 | 000-25753 | |
| 3 | Open Document | Open Filing | 15 Feb 2018 | 12 Feb 2018 | 000-25753 | |
| 3 | Open Document | Open Filing | 13 Jan 2017 | 02 Jan 2017 | 001-34106 | |
| 3 | Open Document | Open Filing | 17 Aug 2016 | 15 Aug 2016 | 000-25753 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 Jul 2014 | 23 Jun 2014 | 000-54026 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 May 2014 | 22 Apr 2014 | 000-54026 |