| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 01 Mar 2023 | 28 Feb 2023 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 23 Feb 2023 | 21 Feb 2023 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 28 May 2021 | 26 May 2021 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 28 May 2020 | 27 May 2020 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 12 Dec 2019 | 11 Dec 2019 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 26 Jul 2019 | 24 Jul 2019 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 02 Jul 2018 | 28 Jun 2018 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 30 Jun 2017 | 28 Jun 2017 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 | 24 Jun 2016 | 22 Jun 2016 | 000-20288 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jun 2015 | 24 Jun 2015 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 04 Nov 2014 | 01 Nov 2014 | 000-20288 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 04 Nov 2014 | 01 Nov 2014 | 000-20288 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 04 Nov 2014 | 01 Nov 2014 | 001-35775 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 10 Sep 2014 | 09 Sep 2014 | 001-35775 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 11 Feb 2014 | 11 Feb 2014 | 001-35775 |