| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 - | 25 May 2021 | 25 May 2021 | 001-08931 |
| 4 | Open Document | Open Filing | FORM 4 - | 01 Dec 2020 | 27 Nov 2020 | 001-08931 |
| 4 | Open Document | Open Filing | FORM 4 - | 05 Oct 2020 | 01 Oct 2020 | 001-08931 |
| 4 | Open Document | Open Filing | FORM 4 - | 03 Dec 2019 | 29 Nov 2019 | 001-08931 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Nov 2019 | 01 Nov 2019 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 - | 03 Oct 2019 | 01 Oct 2019 | 001-08931 |
| 4 | Open Document | Open Filing | FORM 4 | 27 Sep 2019 | 25 Sep 2019 | 000-26820 |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jun 2019 | 11 Jun 2019 | 000-26820 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Mar 2019 | 03 Mar 2019 | 000-20853 |
| 4 | Open Document | Open Filing | FORM 4 - | 26 Nov 2018 | 21 Nov 2018 | 001-08931 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Nov 2018 | 01 Nov 2018 | 000-20853 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Oct 2018 | 08 Oct 2018 | 000-20853 |
| 3 | Open Document | Open Filing | FORM 3 - | 04 Sep 2018 | 04 Sep 2018 | 001-08931 |
| 4 | Open Document | Open Filing | FORM 4 | 14 Jun 2018 | 12 Jun 2018 | 000-26820 |
| 4 | Open Document | Open Filing | FORM 4 | 15 Jun 2017 | 13 Jun 2017 | 000-26820 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 10 Jun 2016 | 08 Jun 2016 | 000-26820 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 11 Jun 2015 | 10 Jun 2015 | 000-26820 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 Jun 2014 | 12 Jun 2014 | 000-26820 |