| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 5 | Open Document | Open Filing | FORM 5 SUBMISSION | May 18, 2021 | Dec 28, 2020 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 15, 2020 | May 6, 2020 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 9, 2019 | May 8, 2019 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 11, 2018 | May 9, 2018 | 000-31285 |
| 4/A | Open Document | Open Filing | FORM 4/A SUBMISSION | May 17, 2017 | May 11, 2017 | 000-31285 |
| 4/A | Open Document | Open Filing | FORM 4/A SUBMISSION | May 17, 2017 | May 12, 2016 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 16, 2017 | May 11, 2017 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 16, 2016 | May 12, 2016 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 16, 2016 | May 12, 2016 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Aug 13, 2015 | Aug 12, 2015 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 18, 2015 | May 14, 2015 | 000-31285 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 25, 2014 | Apr 24, 2014 | 000-31285 |