| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 1, 2022 | Jan 31, 2022 | 000-26584 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 1, 2021 | Oct 29, 2021 | 000-26584 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2021 | May 3, 2021 | 000-26584 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2020 | May 4, 2020 | 000-26584 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 20, 2019 | May 16, 2019 | 001-14793 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 30, 2019 | Apr 30, 2019 | 000-26584 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 25, 2019 | Apr 24, 2019 | 001-14793 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 1, 2018 | Oct 30, 2018 | 001-14793 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Oct 2, 2018 | Sep 29, 2018 | 001-14793 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 21, 2018 | Sep 19, 2018 | 001-14793 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 30, 2018 | Apr 27, 2018 | 000-26584 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 25, 2018 | Apr 24, 2018 | 001-14793 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Oct 3, 2017 | Sep 29, 2017 | 001-14793 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 1, 2017 | Apr 28, 2017 | 000-26584 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 25, 2017 | Apr 24, 2017 | 001-14793 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 6, 2016 | Dec 6, 2016 | 000-26584 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Oct 3, 2016 | Sep 29, 2016 | 001-14793 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 27, 2016 | Sep 24, 2016 | 001-14793 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 3, 2016 | Apr 29, 2016 | 000-26584 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 27, 2016 | Apr 25, 2016 | 001-14793 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 7, 2016 | Mar 1, 2016 | 000-26584 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 28, 2015 | Apr 24, 2015 | 001-14793 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Sep 2, 2014 | Aug 28, 2014 | 001-14793 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 28, 2014 | Apr 24, 2014 | 001-14793 |