| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 4, 2021 | Aug 2, 2021 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 23, 2021 | Mar 19, 2021 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2021 | Mar 3, 2021 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2021 | Feb 1, 2021 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 1, 2021 | Jan 28, 2021 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 5, 2020 | Aug 3, 2020 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2020 | Mar 2, 2020 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2020 | Feb 3, 2020 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 27, 2020 | Jan 23, 2020 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 5, 2019 | Aug 1, 2019 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 1, 2019 | Jul 30, 2019 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 22, 2019 | Jul 19, 2019 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2019 | Mar 1, 2019 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2019 | Feb 1, 2019 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 28, 2019 | Jan 24, 2019 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 21, 2018 | Aug 20, 2018 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 15, 2018 | Aug 14, 2018 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 3, 2018 | Aug 1, 2018 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 2, 2018 | Mar 1, 2018 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2018 | Feb 1, 2018 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 29, 2018 | Jan 25, 2018 | 000-23939 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 21, 2017 | Jul 20, 2017 | 000-23939 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 7, 2017 | Jul 1, 2017 | 000-23939 |