| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Jun 2022 | 27 Jun 2022 | 000-21392 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Jun 2021 | 14 Jun 2021 | 000-21392 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Jul 2020 | 13 Jul 2020 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 21 May 2019 | 20 May 2019 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Oct 2018 | 14 May 2018 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 - | 04 May 2018 | 02 May 2018 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 - | 03 May 2018 | 01 May 2018 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2017 | 15 May 2017 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 - | 05 May 2017 | 03 May 2017 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 - | 09 Aug 2016 | 08 Aug 2016 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 Jul 2016 | 11 Jul 2016 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 - | 09 May 2016 | 05 May 2016 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 - | 06 May 2016 | 04 May 2016 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 08 Jul 2015 | 06 Jul 2015 | 000-21392 |
| 4/A | Open Document | Open Filing | FORM 4/A - | 30 Jun 2015 | 05 Jun 2015 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 - | 08 Jun 2015 | 04 Jun 2015 | 001-36867 |
| 4 | Open Document | Open Filing | FORM 4 - | 13 May 2014 | 09 May 2014 | 000-55075 |
| 4 | Open Document | Open Filing | 2014 NON-EMPLOYEE DIRECTOR GRANT | 13 Mar 2014 | 11 Mar 2014 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 - | 08 Nov 2013 | 06 Nov 2013 | 000-55075 |
| 4 | Open Document | Open Filing | FORM 4 - | 03 Oct 2013 | 01 Oct 2013 | 000-55075 |
| 3 | Open Document | Open Filing | FORM 3 - | 03 Oct 2013 | 01 Oct 2013 | 000-55075 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Oct 2013 | 30 Sep 2013 | 000-53772 |
| 4 | Open Document | Open Filing | FORM 4 | 11 Jul 2013 | 09 Jul 2013 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 | 09 May 2013 | 07 May 2013 | 000-53772 |
| 4 | Open Document | Open Filing | FORM 4 | 18 Sep 2012 | 14 Sep 2012 | 000-53772 |
| 4 | Open Document | Open Filing | FORM 4 | 12 Jul 2012 | 10 Jul 2012 | 333-176897 |