| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | May 24, 2021 | May 20, 2021 | 001-09818 |
| 4 | Open Document | Open Filing | FORM 4 | May 21, 2020 | May 20, 2020 | 001-09818 |
| 4 | Open Document | Open Filing | FORM 4 | May 16, 2019 | May 14, 2019 | 001-09818 |
| 4 | Open Document | Open Filing | FORM 4 | May 15, 2018 | May 15, 2018 | 001-09818 |
| 3 | Open Document | Open Filing | FORM 3 | Nov 24, 2017 | Nov 14, 2017 | 000-29961 |
| 3 | Open Document | Open Filing | FORM 3 | Nov 24, 2017 | Nov 14, 2017 | 001-09818 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Oct 28, 2014 | Oct 28, 2014 | 811-22991 |