| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2021 | 18 May 2021 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2021 | 17 May 2021 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2021 | 10 May 2021 | 000-12508 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2021 | 31 Dec 2020 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2020 | 18 May 2020 | 000-12508 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Feb 2020 | 31 Dec 2019 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2019 | 20 May 2019 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Mar 2019 | 08 Mar 2019 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Mar 2019 | 07 Mar 2019 | 000-12508 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2019 | 31 Dec 2018 | 000-12508 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 24 May 2018 | 21 May 2018 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2018 | 21 May 2018 | 000-12508 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jul 2017 | 20 Jul 2017 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jul 2017 | 24 Jul 2017 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2017 | 15 May 2017 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Dec 2016 | 13 Dec 2016 | 000-12508 |
| 144 | Open Document | Open Filing | 144 | 12 Dec 2016 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Nov 2016 | 18 Nov 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Nov 2016 | 21 Nov 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Nov 2016 | 15 Nov 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Nov 2016 | 14 Nov 2016 | 000-12508 |
| 144 | Open Document | Open Filing | 144 | 14 Nov 2016 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Nov 2016 | 11 Nov 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Nov 2016 | 10 Nov 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Nov 2016 | 09 Nov 2016 | 000-12508 |
| 144 | Open Document | Open Filing | 144 | 31 Oct 2016 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2016 | 16 May 2016 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Jul 2015 | 24 Jul 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jul 2015 | 22 Jul 2015 | 000-12508 |
| 144/A | Open Document | Open Filing | 144/A | 22 Jul 2015 | ||
| 144 | Open Document | Open Filing | 144 | 22 Jul 2015 | ||
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2015 | 20 May 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Mar 2015 | 12 Mar 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Mar 2015 | 10 Mar 2015 | 000-12508 |
| 144 | Open Document | Open Filing | 144 | 10 Mar 2015 | ||
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2015 | 04 Mar 2015 | 000-12508 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Mar 2015 | 04 Mar 2015 | 000-12508 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Mar 2015 | 04 Mar 2015 | 000-12508 |