| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Apr 8, 2022 | ||
| 5 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 4, 2022 | Jan 29, 2022 | 001-07562 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Apr 9, 2021 | ||
| 5 | Open Document | Open Filing | FORM 5 - | Mar 12, 2021 | Jan 30, 2021 | 001-07562 |
| 5 | Open Document | Open Filing | FORM 5 - | Mar 6, 2020 | Feb 1, 2020 | 001-07562 |
| 5 | Open Document | Open Filing | FORM 5 - | Mar 8, 2019 | Feb 2, 2019 | 001-07562 |
| 5 | Open Document | Open Filing | FORM 5 - | Feb 23, 2018 | Feb 3, 2018 | 001-07562 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Apr 3, 2017 | ||
| 5 | Open Document | Open Filing | FORM 5 - | Feb 17, 2017 | Jan 28, 2017 | 001-07562 |
| 5 | Open Document | Open Filing | FORM 5 - | Mar 4, 2016 | Jan 31, 2016 | 001-07562 |
| 5 | Open Document | Open Filing | FORM 5 - | Mar 13, 2015 | Jan 31, 2015 | 001-07562 |
| 5 | Open Document | Open Filing | FORM 5 - | Mar 14, 2014 | Feb 1, 2014 | 001-07562 |