| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 16 Feb 2022 | 14 Feb 2022 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Feb 2022 | 01 Feb 2022 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jul 2021 | 10 Jul 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jul 2021 | 02 Jul 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2021 | 13 May 2021 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Jul 2020 | 10 Jul 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Jul 2020 | 02 Jul 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2020 | 12 May 2020 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Aug 2019 | 30 Aug 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Jul 2019 | 10 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jul 2019 | 05 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2019 | 03 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jul 2019 | 02 Jul 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2019 | 16 May 2019 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Nov 2018 | 31 Oct 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jul 2018 | 03 Jul 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2018 | 01 Jul 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2018 | 17 May 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Feb 2018 | 01 Feb 2018 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jul 2017 | 05 Jul 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2017 | 01 Jul 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2017 | 11 May 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Feb 2017 | 17 Feb 2017 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Aug 2016 | 08 Aug 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jul 2016 | 01 Jul 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2016 | 12 May 2016 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Oct 2015 | 22 Oct 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jul 2015 | 02 Jul 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jul 2015 | 01 Jul 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 May 2015 | 13 May 2015 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Oct 2014 | 21 Oct 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jul 2014 | 05 Jul 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2014 | 01 Jul 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2014 | 14 May 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Feb 2014 | 21 Feb 2014 | 000-18548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2014 | 13 Feb 2014 | 000-18548 |