| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 31, 2021 | Aug 28, 2021 | 001-39375 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 10, 2020 | Nov 9, 2020 | 001-39375 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 1, 2020 | Aug 28, 2020 | 001-39375 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2020 | Feb 13, 2020 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 23, 2019 | Sep 17, 2019 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 30, 2019 | Aug 28, 2019 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 30, 2018 | Aug 28, 2018 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 17, 2018 | Aug 16, 2018 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 21, 2017 | Aug 18, 2017 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 29, 2017 | Mar 27, 2017 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2017 | Mar 1, 2017 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2017 | Feb 21, 2017 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 23, 2016 | Aug 20, 2016 | 000-16195 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 24, 2016 | Mar 22, 2016 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 3, 2015 | Oct 30, 2015 | 000-16195 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 18, 2015 | Aug 15, 2015 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 29, 2015 | Jan 29, 2015 | 000-16195 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 19, 2014 | Aug 16, 2014 | 000-16195 |