| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Jul 2025 | 17 Jul 2025 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Jun 2025 | 07 Jun 2025 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Apr 2025 | 24 Apr 2025 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Jun 2024 | 07 Jun 2024 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 24 May 2024 | 22 May 2024 | 000-50646 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2024 | 12 May 2024 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Jun 2023 | 01 Jun 2023 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 May 2023 | 25 May 2023 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 19 May 2023 | 17 May 2023 | 000-50646 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2023 | 12 May 2023 | 000-20853 |
| 144 | Open Document | Open Filing | 15 May 2023 | |||
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 03 Jun 2022 | 02 Jun 2022 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 23 May 2022 | 19 May 2022 | 000-50646 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2022 | 13 May 2022 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Jun 2021 | 08 Jun 2021 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jun 2021 | 14 May 2021 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Jun 2021 | 03 Jun 2021 | 000-50646 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 01 Jun 2021 | 27 May 2021 | 000-50350 |
| 4 | Open Document | Open Filing | 24 May 2021 | 20 May 2021 | 000-50646 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Sep 2020 | 02 Sep 2020 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Jun 2020 | 02 Jun 2020 | 000-50646 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 29 May 2020 | 28 May 2020 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2020 | 15 May 2020 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Dec 2019 | 05 Dec 2019 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Nov 2019 | 13 Nov 2019 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Jun 2019 | 03 Jun 2019 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Jun 2019 | 31 May 2019 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 31 May 2019 | 30 May 2019 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 28 May 2019 | 23 May 2019 | 000-50646 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2019 | 21 May 2019 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2019 | 17 May 2019 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Mar 2019 | 12 Mar 2019 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 23 Jan 2019 | 18 Jan 2019 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 24 Oct 2018 | 22 Oct 2018 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Sep 2018 | 13 Sep 2018 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Aug 2018 | 09 Aug 2018 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Aug 2018 | 08 Aug 2018 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Jun 2018 | 31 May 2018 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 22 May 2018 | 18 May 2018 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 17 May 2018 | 15 May 2018 | 000-50646 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Nov 2017 | 13 Nov 2017 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 11 Oct 2017 | 10 Oct 2017 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 22 Aug 2017 | 18 Aug 2017 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 08 Jun 2017 | 07 Jun 2017 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Jun 2017 | 01 Jun 2017 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 30 May 2017 | 25 May 2017 | 000-50646 |
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2017 | 24 May 2017 | 000-50646 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2017 | 19 May 2017 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Oct 2016 | 03 Oct 2016 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 06 Jun 2016 | 03 Jun 2016 | 000-50350 |
| 4 | Open Document | Open Filing | FORM 4 | 31 May 2016 | 26 May 2016 | 000-50646 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 May 2016 | 20 May 2016 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 18 May 2016 | 16 May 2016 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Mar 2016 | 29 Feb 2016 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Nov 2015 | 16 Nov 2015 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Nov 2015 | 03 Nov 2015 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Aug 2015 | 14 Aug 2015 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Jun 2015 | 04 Jun 2015 | 000-50646 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Jun 2015 | 04 Jun 2015 | 000-50646 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 04 Jun 2015 | 02 Jun 2015 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2015 | 15 May 2015 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Mar 2015 | 02 Mar 2015 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Nov 2014 | 14 Nov 2014 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Aug 2014 | 14 Aug 2014 | 000-20853 |
| 4 | Open Document | Open Filing | B. SCHERER FORM 4 (08/08/14) | 08 Aug 2014 | 07 Aug 2014 | 000-50350 |
| 4 | Open Document | Open Filing | B. SCHERER FORM 4 (06/05/14) | 05 Jun 2014 | 03 Jun 2014 | 000-50350 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 May 2014 | 15 May 2014 | 000-20853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Mar 2014 | 03 Mar 2014 | 000-20853 |