| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 13 May 2021 | 11 May 2021 | 000-22418 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Apr 2021 | 01 Apr 2021 | 000-22418 |
| 4 | Open Document | Open Filing | FORM 4 | 06 Jan 2021 | 04 Jan 2021 | 000-22418 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Oct 2020 | 01 Oct 2020 | 000-22418 |
| 4 | Open Document | Open Filing | FORM 4 | 06 Jul 2020 | 01 Jul 2020 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Apr 2020 | 01 Apr 2020 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jan 2020 | 02 Jan 2020 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Oct 2019 | 01 Oct 2019 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2019 | 01 Jul 2019 | 000-22418 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Apr 2019 | 01 Apr 2019 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Apr 2019 | 01 Apr 2019 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jan 2019 | 02 Jan 2019 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Oct 2018 | 01 Oct 2018 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2018 | 02 Jul 2018 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Apr 2018 | 02 Apr 2018 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jan 2018 | 02 Jan 2018 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Oct 2017 | 02 Oct 2017 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jul 2017 | 03 Jul 2017 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Apr 2017 | 03 Apr 2017 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jan 2017 | 03 Jan 2017 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Nov 2016 | 07 Nov 2016 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Oct 2016 | 03 Oct 2016 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Sep 2016 | 06 Sep 2016 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Apr 2016 | 01 Apr 2016 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jan 2016 | 01 Jan 2016 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Oct 2015 | 01 Oct 2015 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jul 2015 | 01 Jul 2015 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Apr 2015 | 01 Apr 2015 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jan 2015 | 02 Jan 2015 | 000-22418 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Nov 2014 | 03 Nov 2014 | 000-22418 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Nov 2014 | 01 Nov 2014 | 000-22418 |