| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Aug 2021 | 27 Aug 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2021 | 19 May 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Feb 2021 | 16 Feb 2021 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Nov 2020 | 13 Nov 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Aug 2020 | 13 Aug 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2020 | 13 May 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Feb 2020 | 21 Feb 2020 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Nov 2019 | 21 Nov 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Aug 2019 | 21 Aug 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2019 | 21 May 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Feb 2019 | 25 Feb 2019 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Nov 2018 | 26 Nov 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Aug 2018 | 23 Aug 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 May 2018 | 23 May 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Feb 2018 | 26 Feb 2018 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Nov 2017 | 27 Nov 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Aug 2017 | 25 Aug 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jun 2017 | 25 May 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Feb 2017 | 20 Feb 2017 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Nov 2016 | 21 Nov 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Nov 2016 | 18 Nov 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Aug 2016 | 22 Aug 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Aug 2016 | 18 Aug 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2016 | 20 May 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2016 | 18 May 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Feb 2016 | 22 Feb 2016 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Nov 2015 | 20 Nov 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Nov 2015 | 20 Nov 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Aug 2015 | 20 Aug 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Aug 2015 | 20 Aug 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2015 | 20 May 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2015 | 20 May 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Feb 2015 | 20 Feb 2015 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Nov 2014 | 21 Nov 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Nov 2014 | 20 Nov 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Aug 2014 | 21 Aug 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Aug 2014 | 20 Aug 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2014 | 21 May 2014 | 000-28274 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2014 | 20 May 2014 | 000-28274 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2014 | 20 May 2014 | 000-28274 |