| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Nov 2, 2021 | Nov 1, 2021 | 001-08061 | |
| 4 | Open Document | Open Filing | Sep 30, 2021 | Sep 29, 2021 | 001-08061 | |
| 4 | Open Document | Open Filing | Mar 22, 2021 | Mar 22, 2021 | 001-08061 | |
| 4 | Open Document | Open Filing | Jan 14, 2021 | Jan 13, 2021 | 001-08061 | |
| 4 | Open Document | Open Filing | Nov 3, 2020 | Nov 1, 2019 | 001-08061 | |
| 4 | Open Document | Open Filing | Jul 10, 2020 | Jul 8, 2020 | 001-08061 | |
| 4 | Open Document | Open Filing | Oct 2, 2019 | Oct 1, 2019 | 001-08061 | |
| 4 | Open Document | Open Filing | Jan 18, 2019 | Jan 16, 2019 | 001-08061 | |
| 4 | Open Document | Open Filing | Oct 11, 2018 | Oct 9, 2018 | 001-08061 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 18, 2018 | May 18, 2018 | 001-08061 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 25, 2017 | Jan 25, 2017 | 001-08061 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 23, 2016 | Aug 19, 2016 | 001-08061 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2015 | Apr 30, 2015 | 001-08061 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 10, 2015 | Apr 8, 2015 | 001-08061 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 17, 2014 | Dec 16, 2014 | 001-08061 |