| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 144 | Open Document | Open Filing | 22 May 2023 | |||
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 12 Aug 2022 | 12 Aug 2022 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 May 2022 | 16 May 2022 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2021 | 17 May 2021 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 May 2020 | 15 May 2020 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 May 2019 | 15 May 2019 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2018 | 16 May 2018 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 15 Nov 2017 | 14 Nov 2017 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2017 | 17 May 2017 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2016 | 16 May 2016 | 000-30941 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Jul 2015 | 15 Jul 2015 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 May 2015 | 14 May 2015 | 000-12853 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 18 May 2015 | 15 May 2015 | 000-30941 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 13 May 2015 | 13 May 2015 | 000-30941 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Dec 2014 | 15 Dec 2014 | 000-12853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Sep 2014 | 12 Sep 2014 | 000-12853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Jun 2014 | 10 Jun 2014 | 000-12853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2014 | 15 May 2014 | 000-12853 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 Mar 2014 | 13 Mar 2014 | 000-12853 |