| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2022 | Apr 1, 2022 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 22, 2021 | Apr 21, 2021 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 5, 2020 | May 1, 2020 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2020 | Jan 1, 2020 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2019 | Jan 1, 2019 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 28, 2018 | Dec 26, 2018 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 19, 2018 | Nov 16, 2018 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2018 | Jan 1, 2018 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2017 | Jan 1, 2017 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2016 | Jan 1, 2016 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2015 | Jan 1, 2015 | 001-03551 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2014 | Jan 1, 2014 | 001-03551 |