| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 20 May 2021 | 20 Oct 2020 | 000-27587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jul 2020 | 31 Aug 2018 | 000-27587 |
| 4 | Open Document | Open Filing | 4 | 09 Jan 2018 | 31 Dec 2017 | 000-27587 |
| 4 | Open Document | Open Filing | 4 | 13 May 2016 | 22 Apr 2016 | 000-27587 |
| SC 13D | Open Document | Open Filing | SC 13D | 13 May 2016 | ||
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jul 2015 | 25 Jun 2015 | 000-27587 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jun 2015 | 26 Jun 2015 | 000-27587 |
| 3 | Open Document | Open Filing | 15 Apr 2014 | 08 Apr 2014 | 000-27587 |