| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Aug 9, 2022 | Aug 5, 2022 | 000-55900 | |
| 4 | Open Document | Open Filing | Jan 3, 2022 | Dec 30, 2021 | 000-55900 | |
| 4 | Open Document | Open Filing | Sep 13, 2021 | Jun 30, 2021 | 000-55900 | |
| 4 | Open Document | Open Filing | Jun 11, 2021 | Apr 21, 2021 | 000-55900 | |
| 5 | Open Document | Open Filing | Jun 3, 2021 | Dec 31, 2020 | 000-55900 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 4, 2018 | May 31, 2018 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 29, 2018 | Mar 27, 2018 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 2, 2018 | Jan 19, 2018 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 1, 2017 | May 31, 2017 | 001-13957 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 4, 2017 | Mar 31, 2017 | 001-13957 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Oct 4, 2016 | Sep 30, 2016 | 001-13957 |