| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 18, 2021 | May 14, 2021 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 5, 2020 | Nov 3, 2020 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 19, 2020 | May 15, 2020 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 6, 2020 | May 4, 2020 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 20, 2019 | Nov 18, 2019 | 000-32405 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 22, 2019 | May 20, 2019 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 2, 2018 | Jul 31, 2018 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 22, 2018 | May 18, 2018 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 17, 2017 | Nov 15, 2017 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 23, 2017 | May 19, 2017 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2016 | Nov 7, 2016 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 24, 2016 | May 20, 2016 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 19, 2015 | May 15, 2015 | 000-32405 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 20, 2014 | May 16, 2014 | 000-32405 |