| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 - | 18 May 2021 | 14 May 2021 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 18 Feb 2020 | 14 Feb 2020 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 18 Nov 2019 | 14 Nov 2019 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 Aug 2019 | 14 Aug 2019 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 17 May 2019 | 15 May 2019 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 19 Feb 2019 | 14 Feb 2019 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 Nov 2018 | 14 Nov 2018 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 14 Aug 2018 | 14 Aug 2018 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 04 Jun 2018 | 31 May 2018 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 17 May 2018 | 15 May 2018 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 Feb 2018 | 14 Feb 2018 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 Nov 2017 | 14 Nov 2017 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 Aug 2017 | 14 Aug 2017 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 15 May 2017 | 15 May 2017 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 Feb 2017 | 14 Feb 2017 | 000-26823 |
| 4 | Open Document | Open Filing | FORM 4 - | 15 Nov 2016 | 14 Nov 2016 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Aug 2016 | 12 Aug 2016 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2016 | 13 May 2016 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Feb 2016 | 12 Feb 2016 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jan 2016 | 22 Jan 2016 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Nov 2015 | 13 Nov 2015 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Aug 2015 | 14 Aug 2015 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2015 | 15 May 2015 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2015 | 13 Feb 2015 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Jan 2015 | 26 Jan 2015 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Nov 2014 | 14 Nov 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Aug 2014 | 14 Aug 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2014 | 15 May 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Feb 2014 | 24 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Feb 2014 | 20 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Feb 2014 | 20 Feb 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Feb 2014 | 18 Feb 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Feb 2014 | 18 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2014 | 14 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2014 | 13 Feb 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Feb 2014 | 12 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2014 | 11 Feb 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2014 | 10 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Feb 2014 | 07 Feb 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Feb 2014 | 06 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Feb 2014 | 05 Feb 2014 | 000-26823 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2014 | 04 Feb 2014 | 000-51952 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jan 2014 | 22 Jan 2014 | 000-26823 |