| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2023 | 24 May 2023 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | 17 May 2023 | 15 May 2023 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Jun 2022 | 01 Jun 2022 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2022 | 24 May 2022 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2021 | 24 May 2021 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | 27 May 2020 | 20 May 2020 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | 25 Jun 2019 | 21 Jun 2019 | 000-08822 |
| 4 | Open Document | Open Filing | FORM 4 | 08 Feb 2019 | 06 Feb 2019 | 000-08822 |
| 3 | Open Document | Open Filing | FORM 3 | 08 Feb 2019 | 06 Feb 2019 | 000-08822 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Sep 2017 | 08 Sep 2017 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | 31 May 2017 | 26 May 2017 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2017 | 24 May 2017 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | 10 Nov 2016 | 09 Nov 2016 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2016 | 24 May 2016 | 001-35007 |
| 4 | Open Document | Open Filing | FORM 4 | 12 Nov 2015 | 09 Nov 2015 | 001-35007 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 24 Jun 2015 | 22 Jun 2015 | 001-35007 |