| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jan 12, 2022 | Jan 11, 2022 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 23, 2020 | Dec 22, 2020 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 13, 2020 | Jan 10, 2020 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 7, 2019 | Jan 4, 2019 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 4, 2018 | Jan 2, 2018 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 24, 2017 | Jul 21, 2017 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 26, 2017 | May 25, 2017 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 9, 2017 | Jan 6, 2017 | 000-31141 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 2, 2016 | Oct 31, 2016 | 000-31141 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Jul 29, 2016 | Jul 22, 2016 | 000-31141 |