| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 Mar 2023 | 14 Mar 2023 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Apr 2020 | 04 Mar 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Mar 2020 | 20 Mar 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Mar 2020 | 17 Mar 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Mar 2020 | 12 Mar 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Mar 2020 | 10 Mar 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2020 | 05 Mar 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Mar 2020 | 02 Mar 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Feb 2020 | 26 Feb 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Feb 2020 | 21 Feb 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Feb 2020 | 19 Feb 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Feb 2020 | 19 Feb 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2020 | 13 Feb 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Feb 2020 | 07 Feb 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Feb 2020 | 04 Feb 2020 | 000-26497 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Feb 2020 | 27 Jan 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Feb 2020 | 30 Jan 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Jan 2020 | 27 Jan 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jan 2020 | 02 Jan 2020 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Dec 2019 | 30 Dec 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Dec 2019 | 27 Dec 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Dec 2019 | 23 Dec 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Dec 2019 | 19 Dec 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Dec 2019 | 16 Dec 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Dec 2019 | 11 Dec 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Dec 2019 | 06 Dec 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Nov 2019 | 26 Nov 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Nov 2019 | 13 Nov 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Nov 2019 | 07 Nov 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Oct 2019 | 05 Oct 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Oct 2019 | 27 Sep 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Sep 2019 | 24 Sep 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Sep 2019 | 05 Sep 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Sep 2019 | 29 Aug 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Jul 2019 | 05 Jul 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2019 | 14 May 2019 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Nov 2018 | 20 Aug 2018 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Aug 2018 | 15 Aug 2018 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2018 | 23 May 2018 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 May 2018 | 09 May 2018 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Aug 2017 | 09 Aug 2017 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Jul 2017 | 25 Jul 2017 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Jun 2017 | 27 Jun 2017 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Jun 2017 | 09 Jun 2017 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jun 2017 | 02 Jun 2017 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jun 2017 | 01 Jun 2017 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Feb 2017 | 24 Feb 2017 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Mar 2016 | 08 Mar 2016 | 000-26497 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Sep 2015 | 23 Jun 2015 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Sep 2015 | 11 Jun 2015 | 000-26497 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Jun 2015 | 23 Jun 2015 | 000-26497 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP | 10 Jun 2014 | 06 Jun 2014 | 000-26497 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP | 04 Jun 2014 | 02 Jun 2014 | 000-26497 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP | 30 May 2014 | 28 May 2014 | 000-26497 |