| 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 | Jun 11, 2021 | Jun 9, 2021 | 000-27687 |
| 4 | Open Document | Open Filing | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | Jun 8, 2021 | Jun 4, 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 | Aug 20, 2018 | Aug 16, 2018 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 13, 2018 | Jun 12, 2018 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 23, 2017 | Aug 22, 2017 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 15, 2017 | Jun 13, 2017 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 1, 2016 | Jun 30, 2016 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 15, 2016 | Jun 14, 2016 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 9, 2016 | Jun 7, 2016 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 18, 2016 | Feb 17, 2016 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 17, 2015 | Jun 16, 2015 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Feb 26, 2015 | Feb 25, 2015 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 16, 2014 | Jun 24, 2014 | 000-27687 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 21, 2014 | May 20, 2014 | 000-27687 |