| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jun 1, 2021 | May 27, 2021 | 000-25837 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jun 1, 2020 | May 28, 2020 | 000-25837 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 28, 2019 | May 23, 2019 | 000-25837 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 29, 2018 | May 24, 2018 | 000-25837 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 30, 2017 | May 25, 2017 | 000-25837 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 31, 2016 | May 26, 2016 | 000-25837 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Mar 16, 2016 | Feb 23, 2016 | 000-25837 |