| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Feb 22, 2022 | Feb 18, 2022 | 001-15451 | |
| 4 | Open Document | Open Filing | Feb 11, 2022 | Feb 9, 2022 | 001-15451 | |
| 4 | Open Document | Open Filing | Jan 28, 2022 | Jan 26, 2022 | 001-15451 | |
| 4 | Open Document | Open Filing | Oct 5, 2021 | Oct 1, 2021 | 001-15451 | |
| 4 | Open Document | Open Filing | Aug 20, 2021 | Aug 19, 2021 | 001-15451 | |
| 4 | Open Document | Open Filing | Feb 19, 2021 | Feb 19, 2021 | 001-15451 | |
| 4/A | Open Document | Open Filing | Feb 19, 2021 | Feb 10, 2021 | 001-15451 | |
| 4 | Open Document | Open Filing | Feb 12, 2021 | Feb 10, 2021 | 001-15451 | |
| 4 | Open Document | Open Filing | Jan 29, 2021 | Jan 27, 2021 | 001-15451 | |
| 4 | Open Document | Open Filing | Feb 14, 2020 | Feb 12, 2020 | 001-15451 | |
| 4 | Open Document | Open Filing | Jan 24, 2020 | Jan 22, 2020 | 001-15451 | |
| 4 | Open Document | Open Filing | Feb 19, 2019 | Feb 14, 2019 | 001-15451 | |
| 4 | Open Document | Open Filing | Jan 25, 2019 | Jan 23, 2019 | 001-15451 | |
| 4 | Open Document | Open Filing | Mar 2, 2018 | Mar 1, 2018 | 001-15451 | |
| 4 | Open Document | Open Filing | Jan 26, 2018 | Jan 24, 2018 | 001-15451 | |
| 4 | Open Document | Open Filing | Jan 5, 2018 | Jan 5, 2018 | 001-15451 | |
| 3 | Open Document | Open Filing | Dec 15, 2017 | Dec 11, 2017 | 001-15451 |