| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 05 Aug 2021 | 03 Aug 2021 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 01 Mar 2021 | 25 Feb 2021 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 26 Feb 2021 | 24 Feb 2021 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 06 Nov 2020 | 04 Nov 2020 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 28 Oct 2020 | 26 Oct 2020 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Aug 2020 | 31 Jul 2020 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 30 Jul 2020 | 28 Jul 2020 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Mar 2020 | 01 Mar 2020 | 000-26640 |
| 4 | Open Document | Open Filing | FORM 4 | 28 Feb 2020 | 26 Feb 2020 | 000-26640 |
| 5 | Open Document | Open Filing | FORM 5 | 13 Feb 2020 | 31 Dec 2019 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Oct 2019 | 21 Oct 2019 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Aug 2019 | 21 Aug 2019 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Aug 2019 | 05 Mar 2019 | 000-26640 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Mar 2019 | 27 Feb 2019 | 000-26640 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Mar 2019 | 27 Feb 2019 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Mar 2019 | 27 Feb 2019 | 000-26640 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2019 | 31 Dec 2018 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Aug 2018 | 21 Aug 2018 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2018 | 11 May 2018 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Mar 2018 | 28 Feb 2018 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Feb 2018 | 26 Feb 2018 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Feb 2018 | 22 Feb 2018 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Mar 2017 | 01 Mar 2017 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Mar 2017 | 27 Feb 2017 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Feb 2017 | 27 Feb 2017 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Feb 2017 | 21 Feb 2017 | 000-26640 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Feb 2017 | 31 Dec 2016 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Jul 2016 | 26 Jul 2016 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Mar 2016 | 27 Feb 2016 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Feb 2016 | 25 Feb 2016 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Nov 2015 | 02 Nov 2015 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Oct 2015 | 27 Oct 2015 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Mar 2015 | 28 Feb 2015 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Mar 2015 | 26 Feb 2015 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Feb 2015 | 23 Feb 2015 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Jan 2015 | 05 Jan 2015 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Aug 2014 | 06 Aug 2014 | 000-26640 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Mar 2014 | 27 Feb 2014 | 000-26640 |