| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 27, 2022 | May 25, 2022 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 3, 2021 | Jun 1, 2021 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 17, 2021 | May 13, 2021 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 6, 2020 | Jul 2, 2020 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 3, 2020 | Jun 1, 2020 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 3, 2019 | Jul 1, 2019 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2019 | Feb 12, 2019 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 16, 2018 | Aug 15, 2018 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 14, 2018 | Aug 14, 2018 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 2, 2018 | Jul 1, 2018 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 | May 9, 2018 | May 8, 2018 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 2, 2018 | Feb 28, 2018 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 20, 2018 | Feb 15, 2018 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 1, 2017 | Nov 30, 2017 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 13, 2017 | Nov 8, 2017 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 5, 2017 | Aug 31, 2017 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 15, 2017 | Aug 14, 2017 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 14, 2017 | Aug 14, 2017 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 5, 2017 | Jul 1, 2017 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2017 | May 31, 2017 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | May 12, 2017 | May 10, 2017 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 10, 2017 | May 9, 2017 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 9, 2017 | May 5, 2017 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 15, 2017 | Mar 14, 2017 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 1, 2017 | Feb 28, 2017 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 27, 2017 | Feb 23, 2017 | 000-21318 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 14, 2017 | Feb 13, 2017 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 2, 2016 | Nov 30, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 1, 2016 | Nov 30, 2016 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 15, 2016 | Nov 15, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 4, 2016 | Nov 3, 2016 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2016 | Aug 31, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 30, 2016 | Aug 26, 2016 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 29, 2016 | Aug 26, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 26, 2016 | Aug 26, 2016 | 000-21318 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 6, 2016 | Jul 1, 2016 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2016 | May 31, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | May 27, 2016 | May 26, 2016 | 000-21318 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 19, 2016 | May 18, 2016 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 17, 2016 | May 17, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | May 6, 2016 | May 4, 2016 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 17, 2016 | Mar 16, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 2, 2016 | Feb 29, 2016 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 18, 2016 | Feb 17, 2016 | 000-21318 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 1, 2016 | Aug 26, 2015 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 1, 2015 | Nov 30, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 9, 2015 | Nov 5, 2015 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 1, 2015 | Aug 31, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 21, 2015 | Aug 20, 2015 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2015 | May 29, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | May 7, 2015 | May 6, 2015 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 12, 2015 | Mar 11, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2015 | Feb 27, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 2, 2015 | Feb 26, 2015 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 26, 2015 | Feb 26, 2015 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2015 | Feb 26, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 23, 2015 | Feb 19, 2015 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2015 | Feb 19, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 18, 2015 | Feb 17, 2015 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 17, 2015 | Feb 13, 2015 | 000-21318 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 30, 2015 | Jan 28, 2015 | 000-18914 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 5, 2014 | Dec 3, 2014 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 3, 2014 | Dec 3, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 1, 2014 | Nov 28, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 18, 2014 | Nov 18, 2014 | 001-12997 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 22, 2014 | Aug 29, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 2, 2014 | Aug 29, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 5, 2014 | Aug 1, 2014 | 000-21318 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 13, 2014 | Jun 12, 2014 | 000-18914 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2014 | May 30, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 | May 9, 2014 | May 7, 2014 | 000-21318 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 20, 2014 | Mar 19, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 4, 2014 | Feb 28, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 20, 2014 | Feb 19, 2014 | 001-12997 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 29, 2014 | Jan 28, 2014 | 000-18914 |