| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 17 May 2021 | 13 May 2021 | 001-08604 |
| 4/A | Open Document | Open Filing | FORM 4/A | 16 Nov 2020 | 15 Nov 2020 | 001-08604 |
| 4 | Open Document | Open Filing | FORM 4 | 16 Nov 2020 | 15 Nov 2020 | 001-08604 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2019 | 17 May 2019 | 001-08604 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2018 | 17 May 2018 | 001-08604 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 May 2017 | 22 May 2017 | 001-08604 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2016 | 01 Jun 2016 | 001-08604 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 06 Oct 2015 | 01 Oct 2015 | 001-12488 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 06 Oct 2015 | 01 Oct 2015 | 001-12488 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Sep 2015 | 24 Sep 2015 | 001-08604 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Aug 2015 | 07 Aug 2015 | 001-08604 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 03 Oct 2014 | 01 Oct 2012 | 001-12488 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 04 Dec 2013 | 30 Sep 2013 | 001-12488 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 31 Aug 2012 | 20 Aug 2012 | 001-12488 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 31 Aug 2012 | 20 Aug 2012 | 001-12488 |