| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2022 | Jan 31, 2022 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 1, 2022 | Jan 30, 2022 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 3, 2021 | Nov 1, 2021 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 3, 2021 | Jul 30, 2021 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2021 | May 28, 2021 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2021 | Apr 30, 2021 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2021 | Jan 30, 2021 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 3, 2020 | Oct 30, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 31, 2020 | Jul 30, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 2, 2020 | Jul 1, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2020 | Apr 30, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 9, 2020 | Apr 7, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 4, 2020 | Mar 2, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2020 | Feb 3, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2020 | Jan 30, 2020 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 5, 2019 | Nov 1, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 1, 2019 | Oct 30, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 5, 2019 | Aug 1, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 1, 2019 | Jul 30, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 3, 2019 | May 1, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 2, 2019 | Apr 30, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 5, 2019 | Apr 3, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2019 | Feb 25, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2019 | Feb 1, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 1, 2019 | Jan 30, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 29, 2019 | Jan 25, 2019 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 5, 2018 | Nov 1, 2018 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 1, 2018 | Oct 30, 2018 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 29, 2018 | Oct 25, 2018 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 3, 2018 | Aug 1, 2018 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 1, 2018 | Jul 30, 2018 | 000-06217 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 27, 2018 | Jul 25, 2018 | 000-06217 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | May 24, 2018 | May 16, 2018 | 000-06217 |