| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | Jul 5, 2022 | Jun 30, 2022 | 000-27687 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | Jun 14, 2021 | Jun 10, 2021 | 000-27687 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 21, 2020 | Jul 17, 2020 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 13, 2019 | Jun 11, 2019 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 13, 2018 | Dec 4, 2018 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Nov 6, 2018 | Nov 2, 2018 | 000-27687 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Nov 6, 2018 | Nov 2, 2018 | 000-27687 |