| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2022 | Mar 2, 2022 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 10, 2021 | Aug 9, 2021 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 29, 2021 | May 12, 2021 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 12, 2021 | Mar 10, 2021 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 25, 2020 | Jun 24, 2020 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2020 | May 4, 2020 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 2, 2019 | Jun 28, 2019 | 000-18277 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 31, 2018 | Jul 26, 2018 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 1, 2018 | Apr 27, 2018 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 1, 2018 | Feb 27, 2018 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 28, 2017 | Apr 27, 2017 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 7, 2016 | Dec 6, 2016 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 6, 2014 | Nov 5, 2014 | 000-18277 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 29, 2014 | Jul 28, 2014 | 000-18277 |